Optical lens and electronic equipment with same

Abstract

The invention provides an optical lens and electronic equipment with the optical lens, and the optical lens comprises a first lens which has positive focal power, and the first side surface of the first lens is a convex surface; the second lens has negative focal power, and the first side surface of the second lens is a concave surface; the third lens has positive focal power; the fourth lens has positive focal power, and the second side surface of the fourth lens is a convex surface; and the fifth lens has positive focal power, and the first side surface of the fifth lens is a convex surface. According to the invention, the problem that miniaturization, long back focus, low sensitivity and small distortion of an optical lens in the prior art are difficult to consider at the same time is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of optical imaging devices, and more particularly, to an optical lens and an electronic device having the same. Background Art

[0002] In recent years, with the development of technology, the demand for optical lenses in daily life has been increasing, and optical lenses have been applied to more and more scenarios. For example, in the automotive driving industry, for driving safety, it is necessary to detect the driving environment more accurately, and optical lenses have become key devices for detecting information around the vehicle. At the same time, with the rapid development of automotive autonomous driving assistance systems, the number of optical lenses used in vehicles has gradually increased.

[0003] With the development of intelligent headlights, users' requirements for the way of interaction between people and vehicles and for audio-visual entertainment are constantly increasing, which also requires projection optical lenses to have higher resolution. Due to the need to improve image quality, the optical lenses in the prior art use a large number of lenses. In order to meet the installation requirements in a small space, when controlling the miniaturization of the optical lens, the back focal length of the optical lens is short, and there is not enough focusing or installation space left in the module assembly. In addition, the aberration problems such as chromatic aberration, astigmatism, and distortion of the existing optical lenses are relatively serious, the resolution is low, the realization of pattern details is poor, and the user experience is not good.

[0004] That is to say, there is a problem in the prior art that it is difficult to balance miniaturization, long back focal length, low sensitivity, and small distortion of optical lenses. Summary of the Invention

[0005] The main object of the present invention is to provide an optical lens and an electronic device having the same, so as to solve the problem in the prior art that it is difficult to balance miniaturization, long back focal length, low sensitivity, and small distortion of optical lenses.

[0006] To achieve the above object, according to one aspect of the present invention, there is provided an optical lens, including: a first lens having a positive optical power, the first side of the first lens being a convex surface; a second lens having a negative optical power, the first side of the second lens being a concave surface; a third lens having a positive optical power; a fourth lens having a positive optical power, the second side of the fourth lens being a convex surface; and a fifth lens having a positive optical power, the first side of the fifth lens being a convex surface.

[0007] Further, the second side of the first lens is a convex surface or a flat surface or a concave surface.

[0008] Further, the second side of the second lens is a concave surface or a convex surface or a flat surface.

[0009] Further, the first side of the third lens is concave, and the second side of the third lens is convex; or the first side of the third lens is convex, and the second side of the third lens is concave; or the first side of the third lens is flat, and the second side of the third lens is convex.

[0010] Further, the first side of the fourth lens is concave or convex or flat.

[0011] Further, the second side of the fifth lens is concave or convex or flat.

[0012] Further, the first lens is an aspherical lens; or both the first lens and the second lens are aspherical lenses.

[0013] Further, the second side of the first lens has an inflection point.

[0014] Further, the radian value θ of the maximum field of view angle of the optical lens, the overall focal length F of the optical lens, and the image height H corresponding to the maximum field of view angle of the optical lens satisfy: |(H - F*θ) / (F*θ)| ≤ 0.15.

[0015] Further, the back focal length BFL of the optical lens and the total track length TTL of the optical lens satisfy: BFL / TTL ≥ 0.3.

[0016] Further, the back focal length BFL of the optical lens and the total track length TTL of the optical lens satisfy: BFL / TTL ≥ 0.32.

[0017] Further, the back focal length BFL of the optical lens and the lens group length TL of the optical lens satisfy: BFL / TL ≥ 0.35.

[0018] Further, the overall focal length F of the optical lens and the image height H corresponding to the maximum field of view angle of the optical lens satisfy: F / H ≥ 1.5.

[0019] Further, the overall focal length F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy: F / ENPD ≤ 1.7.

[0020] Further, the overall focal length F of the optical lens and the effective aperture DST of the diaphragm of the optical lens satisfy: DST / F ≥ 0.25.

[0021] Further, the maximum field of view angle FOV of the optical lens, the overall focal length F of the optical lens, and the image height H corresponding to the maximum field of view angle of the optical lens satisfy: (FOV × F) / H ≥ 45.

[0022] Furthermore, the radian value θ of the maximum field of view angle of the optical lens, the overall focal length F of the optical lens, and the image height H corresponding to the maximum field of view angle of the optical lens satisfy: (H / 2) / (F * tan(θ / 2)) ≤ 1.8.

[0023] Furthermore, the radius of curvature R1 of the first side of the first lens and the focal length F1 of the first lens satisfy: R1 / F ≤ 6.

[0024] Furthermore, the combined focal length F12 of the first lens and the second lens and the overall focal length F of the optical lens satisfy: F12 / F ≤ -0.5.

[0025] Furthermore, the combined focal length F12 of the first lens and the second lens and the overall focal length F of the optical lens satisfy: -15 ≤ F12 / F ≤ -1.

[0026] Furthermore, the overall focal length F of the optical lens and the combined focal length F34 of the third lens and the fourth lens satisfy: F34 / F ≤ 2.

[0027] Furthermore, the air gap d2 between the first lens and the second lens on the optical axis of the optical lens and the lens group length TL of the optical lens satisfy: d2 / TL ≥ 0.05.

[0028] Furthermore, the sag SAG8 of the second side of the fourth lens, the sag SAG9 of the first side of the fifth lens, the maximum effective aperture D8 of the second side of the fourth lens corresponding to the maximum field of view angle of the optical lens, and the maximum effective aperture D9 of the first side of the fifth lens corresponding to the maximum field of view angle of the optical lens satisfy: -3.2 ≤ (SAG8 / D8) / (SAG9 / D9) ≤ -0.5.

[0029] Furthermore, the focal length F2 of the second lens and the combined focal length F34 of the third lens and the fourth lens satisfy: -2 ≤ F2 / F34 ≤ -0.2.

[0030] Furthermore, the focal length F2 of the second lens and the combined focal length F34 of the third lens and the fourth lens satisfy: -1.5 ≤ F2 / F34 ≤ -0.5.

[0031] Furthermore, the included angle arctan(1 / K(S3)) of the first side of the second lens satisfies: arctan(1 / K(S3)) ≤ -8.

[0032] Furthermore, the sag SAG3 of the first side of the second lens and the maximum effective aperture D3 of the first side of the third lens corresponding to the maximum field of view angle of the optical lens satisfy: -0.16 ≤ SAG3 / D3 ≤ -0.02.

[0033] Furthermore, the sagittal height SAG3 of the first side of the second lens and the maximum effective clear aperture D3 of the first side of the third lens corresponding to the maximum field of view angle of the optical lens satisfy: -0.14 ≤ SAG3 / D3 ≤ -0.05.

[0034] Furthermore, the radius of curvature R9 of the first side of the fifth lens and the overall focal length F of the optical lens satisfy: 0.2 ≤ R9 / F ≤ 8.

[0035] Furthermore, the radius of curvature R9 of the first side of the fifth lens and the overall focal length F of the optical lens satisfy: 0.4 ≤ R9 / F ≤ 5.

[0036] Furthermore, the Abbe number Vd3 of the third lens and the Abbe number Vd4 of the fourth lens satisfy: 0.1 ≤ Vd3 / Vd4 ≤ 2.

[0037] Furthermore, the Abbe number Vd3 of the third lens and the Abbe number Vd4 of the fourth lens satisfy: 0.3 ≤ Vd3 / Vd4 ≤ 1.5.

[0038] Furthermore, the radius of curvature R1 of the first side of the first lens and the radius of curvature R2 of the second side of the first lens satisfy: |R1 / R2| ≤ 4.

[0039] Furthermore, the overall focal length F of the optical lens and the focal length F1 of the first lens satisfy: F1 / F ≥ 0.5.

[0040] Furthermore, the overall focal length F of the optical lens and the focal length F2 of the second lens satisfy: F2 / F ≤ 0.

[0041] Furthermore, the overall focal length F of the optical lens and the focal length F2 of the second lens satisfy: -7 ≤ F2 / F ≤ -0.3.

[0042] Furthermore, the central thickness d6 of the third lens and the central thickness d8 of the fourth lens satisfy: d6 / d8 ≤ 2.

[0043] Furthermore, the central thickness d6 of the third lens and the central thickness d8 of the fourth lens satisfy: d6 / d8 ≤ 1.5.

[0044] According to another aspect of the present invention, there is provided an optical lens, comprising: a first lens having a positive optical power; a second lens having a negative optical power; a third lens having a positive optical power; a fourth lens having a positive optical power; a fifth lens having a positive optical power; wherein, the back focal length BFL of the optical lens and the overall length TTL of the optical lens satisfy: BFL / TTL ≥ 0.3.

[0045] Further, the first side of the first lens is a convex surface, and the second side of the first lens is a convex surface or a flat surface or a concave surface.

[0046] Further, the first side of the second lens is a concave surface, and the second side of the second lens is a concave surface or a convex surface or a flat surface.

[0047] Further, the first side of the third lens is a concave surface, and the second side of the third lens is a convex surface; or the first side of the third lens is a convex surface, and the second side of the third lens is a concave surface; or the first side of the third lens is a flat surface, and the second side of the third lens is a convex surface.

[0048] Further, the first side of the fourth lens is a concave surface or a convex surface or a flat surface, and the second side of the fourth lens is a convex surface.

[0049] Further, the first side of the fifth lens is a convex surface, and the second side of the fifth lens is a concave surface or a convex surface or a flat surface.

[0050] Further, the first lens is an aspherical lens; or both the first lens and the second lens are aspherical lenses.

[0051] Further, the second side of the first lens has an inflection point.

[0052] Further, for the radian value θ of the maximum field of view angle of the optical lens, the overall focal length F of the optical lens, and the image height H corresponding to the maximum field of view angle of the optical lens, the following is satisfied: |(H - F * θ) / (F * θ)| ≤ 0.15.

[0053] Further, for the back focal length BFL of the optical lens and the overall length TTL of the optical lens, the following is satisfied: BFL / TTL ≥ 0.32.

[0054] Further, for the back focal length BFL of the optical lens and the lens group length TL of the optical lens, the following is satisfied: BFL / TL ≥ 0.35.

[0055] Further, for the overall focal length F of the optical lens and the image height H corresponding to the maximum field of view angle of the optical lens, the following is satisfied: F / H ≥ 1.5.

[0056] Further, for the overall focal length F of the optical lens and the entrance pupil diameter ENPD of the optical lens, the following is satisfied: F / ENPD ≤ 1.7.

[0057] Further, for the overall focal length F of the optical lens and the effective aperture DST of the diaphragm of the optical lens, the following is satisfied: DST / F ≥ 0.25.

[0058] Further, for the maximum field of view angle FOV of the optical lens, the overall focal length F of the optical lens, and the image height H corresponding to the maximum field of view angle of the optical lens, the following is satisfied: (FOV × F) / H ≥ 45.

[0059] Further, the radian value θ of the maximum field of view angle of the optical lens, the overall focal length F of the optical lens, and the image height H corresponding to the maximum field of view angle of the optical lens satisfy: (H / 2) / (F*tan(θ / 2)) ≤ 1.8.

[0060] Further, the radius of curvature R1 of the first side of the first lens and the focal length F1 of the first lens satisfy: R1 / F ≤ 6.

[0061] Further, the combined focal length F12 of the first lens and the second lens and the overall focal length F of the optical lens satisfy: F12 / F ≤ -0.5.

[0062] Further, the combined focal length F12 of the first lens and the second lens and the overall focal length F of the optical lens satisfy: -15 ≤ F12 / F ≤ -1.

[0063] Further, the overall focal length F of the optical lens and the combined focal length F34 of the third lens and the fourth lens satisfy: F34 / F ≤ 2.

[0064] Further, the air gap d2 between the first lens and the second lens on the optical axis of the optical lens and the lens group length TL of the optical lens satisfy: d2 / TL ≥ 0.05.

[0065] Further, the sag SAG8 of the second side of the fourth lens, the sag SAG9 of the first side of the fifth lens, the maximum effective aperture D8 of the second side of the fourth lens corresponding to the maximum field of view angle of the optical lens, and the maximum effective aperture D9 of the first side of the fifth lens corresponding to the maximum field of view angle of the optical lens satisfy: -3.2 ≤ (SAG8 / D8) / (SAG9 / D9) ≤ -0.5.

[0066] Further, the focal length F2 of the second lens and the combined focal length F34 of the third lens and the fourth lens satisfy: -2 ≤ F2 / F34 ≤ -0.2.

[0067] Further, the focal length F2 of the second lens and the combined focal length F34 of the third lens and the fourth lens satisfy: -1.5 ≤ F2 / F34 ≤ -0.5.

[0068] Further, the angle arctan(1 / K(S3)) of the first side of the second lens satisfies: arctan(1 / K(S3)) ≤ -8.

[0069] Further, the sag SAG3 of the first side of the second lens and the maximum effective aperture D3 of the first side of the third lens corresponding to the maximum field of view angle of the optical lens satisfy: -0.16 ≤ SAG3 / D3 ≤ -0.02.

[0070] Furthermore, the sag SAG3 of the first side of the second lens and the maximum effective clear aperture D3 of the first side of the third lens corresponding to the maximum field of view angle of the optical lens satisfy: -0.14 ≤ SAG3 / D3 ≤ -0.05.

[0071] Furthermore, the radius of curvature R9 of the first side of the fifth lens and the overall focal length F of the optical lens satisfy: 0.2 ≤ R9 / F ≤ 8.

[0072] Furthermore, the radius of curvature R9 of the first side of the fifth lens and the overall focal length F of the optical lens satisfy: 0.4 ≤ R9 / F ≤ 5.

[0073] Furthermore, the Abbe number Vd3 of the third lens and the Abbe number Vd4 of the fourth lens satisfy: 0.1 ≤ Vd3 / Vd4 ≤ 2.

[0074] Furthermore, the Abbe number Vd3 of the third lens and the Abbe number Vd4 of the fourth lens satisfy: 0.3 ≤ Vd3 / Vd4 ≤ 1.5.

[0075] Furthermore, the radius of curvature R1 of the first side of the first lens and the radius of curvature R2 of the second side of the first lens satisfy: |R1 / R2| ≤ 4.

[0076] Furthermore, the overall focal length F of the optical lens and the focal length F1 of the first lens satisfy: F1 / F ≥ 0.5.

[0077] Furthermore, the overall focal length F of the optical lens and the focal length F2 of the second lens satisfy: F2 / F ≤ 0.

[0078] Furthermore, the overall focal length F of the optical lens and the focal length F2 of the second lens satisfy: -7 ≤ F2 / F ≤ -0.3.

[0079] Furthermore, the central thickness d6 of the third lens and the central thickness d8 of the fourth lens satisfy: d6 / d8 ≤ 2.

[0080] Furthermore, the central thickness d6 of the third lens and the central thickness d8 of the fourth lens satisfy: d6 / d8 ≤ 1.5.

[0081] According to another aspect of the present invention, there is provided an electronic device, including the above optical lens and an imaging element for converting the optical image formed by the optical lens into an electrical signal.

[0082] By setting the first lens to have a positive focal power, which has a converging effect on light rays, it can effectively converge the central and marginal light rays of each field of view, increasing the system illuminance. By setting the first side of the first lens to be convex, it has an elegant appearance in actual use and is not prone to dust accumulation. Optionally, the second side of the first lens is convex, which is beneficial for converging the marginal field light rays and flattening the light ray trend. Of course, the second side of the first lens can also be set to be flat, which is beneficial for maintaining the light ray trend and gently entering the second lens after passing through the air gap. Of course, the second side of the first lens can also be set to be concave, which is beneficial for reducing the aperture of the rear lens group and reducing the volume of the entire lens.

[0083] By setting the second lens to have a negative focal power, the light rays are further diverged, adjusting the light ray deflection angle. The double concave shape is beneficial for reducing the system sensitivity. By setting the first side of the second lens to be concave, in cooperation with the first lens, it collects and converges the marginal field light rays. Optionally, the second side of the second lens is concave, reducing the light ray deflection angle, which is beneficial for flattening the light ray trend and reducing the sensitivity. Of course, the second side of the second lens can also be set to be convex, converging the light rays, which is beneficial for reducing the converging pressure of the rear optical system and reasonably distributing the focal power. Of course, the second side of the second lens can also be set to be flat, maintaining the light ray divergence situation, and requiring the rear optical system to re-converge the light rays, which is beneficial for lengthening the optical back focal length.

[0084] By setting the third lens to have a positive focal power, which has a converging effect on light rays, it enables the light ray trend to smoothly transition into the fourth lens, reducing the sensitivity of the rear optical system. Optionally, the first side of the third lens is concave, and the second side of the third lens is convex, that is, the third lens is a meniscus lens convex towards the second side. The concave first side of the third lens is beneficial for collecting the light rays passing through the second lens. The convex second side of the third lens can converge the light rays, enabling the light ray trend to smoothly transition into the fourth lens, reducing the light ray divergence angle, and reducing the system sensitivity. Of course, the first side of the third lens can also be set to be convex, and the second side of the third lens can be set to be concave, that is, the third lens is a meniscus lens convex towards the first side, which is beneficial for the light rays to smoothly transition and reduce the sensitivity. Of course, the first side of the third lens can also be set to be flat, and the second side of the third lens is convex, which is beneficial for the light ray trend to smoothly transition into the fourth lens, reducing the light ray divergence angle, and reducing the system sensitivity.

[0085] By setting the fourth lens to have a positive focal power, it has a converging effect on light rays. By setting the second side of the fourth lens to be convex, it can converge light rays, enabling the light rays to smoothly transition into the fifth lens, reducing the light ray divergence angle, and lowering the system sensitivity. Optionally, the first side of the fourth lens is concave, that is, the fourth lens is a meniscus lens convex towards the second side, which is beneficial for the smooth transition of light rays and reduces sensitivity. Of course, the first side of the fourth lens can also be set to be convex, which can effectively converge the central light rays and marginal light rays of each field of view and increase the system illuminance. Of course, the first side of the fourth lens can also be set to be flat, which is beneficial for the smooth transition of light rays from the third lens.

[0086] By setting the fifth lens to have a positive focal power, it has a converging effect on light rays, can effectively converge the central light rays and marginal light rays of each field of view, and increase the system illuminance. By setting the first side of the fifth lens to be convex, it is beneficial for converging light rays and increasing the system illuminance. Optionally, the second side of the fifth lens is concave, which further changes the light ray deflection angle, improves the telecentricity of the chief ray, and converges the light rays onto the image plane. Of course, the second side of the fifth lens can also be set to be convex, which is beneficial for lengthening the back focal length, facilitating the assembly of the module and the adjustment of the focal length. Of course, the second side of the fifth lens can also be set to be flat, which is beneficial for the smooth transition of light rays to the image plane, effectively converges the central light rays and marginal light rays of each field of view, and increases the system illuminance.

[0087] The optical lens of the present application controls the second lens to be a negative lens and the first side of the second lens to diverge light rays with a large divergence angle, so that the rear optical system needs to refocus the light rays and lengthen the back focal length. By controlling the ratio of the focal length of the second lens to the combined focal length of the third lens and the fourth lens to be similar, and the second lens has a negative focal length while the combination of the third lens and the fourth lens has a positive focal length, the aberration is corrected by positive and negative compensation. The air gap between the first lens and the second lens is lengthened, making the marginal light ray trend smooth and reducing the system sensitivity.

[0088] Therefore, the optical lens of the present application has the advantage of a long back focal length, leaving enough focusing or installation space in the module assembly. Further, when used in a high-temperature environment, the long back focal length is beneficial for heat dissipation. And the optical lens of the present application also has the advantages of low chromatic aberration and low sensitivity. BRIEF DESCRIPTION OF THE DRAWINGS

[0089] The specification drawings forming a part of the present application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0090] Figure 1 Shows a cross-sectional view of the optical lens of Example 1 of the present invention;

[0091] Figure 2Shows a cross-sectional view of the optical lens of Example 2 of the present invention;

[0092] Figure 3 Shows a cross-sectional view of the optical lens of Example 3 of the present invention;

[0093] Figure 4 Shows a cross-sectional view of the optical lens of Example 4 of the present invention;

[0094] Figure 5 Shows a cross-sectional view of the optical lens of Example 5 of the present invention;

[0095] Figure 6 Shows a cross-sectional view of the optical lens of Example 6 of the present invention;

[0096] Figure 7 Shows a cross-sectional view of the optical lens of Example 7 of the present invention;

[0097] Figure 8 Shows a cross-sectional view of the optical lens of Example 8 of the present invention;

[0098] Figure 9 Shows a cross-sectional view of the optical lens of Example 9 of the present invention;

[0099] Figure 10 Shows a cross-sectional view of the optical lens of Example 10 of the present invention;

[0100] Figure 11 Shows a cross-sectional view of the optical lens of Example 11 of the present invention;

[0101] Figure 12 Shows a cross-sectional view of the optical lens of Example 12 of the present invention;

[0102] Figure 13 Shows a cross-sectional view of the optical lens of Example 13 of the present invention;

[0103] Figure 14 Shows a cross-sectional view of the optical lens of Example 14 of the present invention;

[0104] Figure 15 Shows a cross-sectional view of the optical lens of Example 15 of the present invention;

[0105] Figure 16 Shows a cross-sectional view of the optical lens of Example 16 of the present invention.

[0106] Among them, the above-mentioned drawings include the following reference numerals:

[0107] STO, diaphragm; L1, the first lens; S1, the first side of the first lens; S2, the second side of the first lens; L2, the second lens; S3, the first side of the second lens; S4, the second side of the second lens; L3, the third lens; S5, the first side of the third lens; S6, the second side of the third lens; L4, the fourth lens; S7, the first side of the fourth lens; S8, the second side of the fourth lens; L5, the fifth lens; S9, the first side of the fifth lens; S10, the second side of the fifth lens; S11, the first side of the filter; S12, the second side of the filter; IMA, imaging surface. Detailed implementation manners

[0108] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0109] It should be pointed out that, unless otherwise specified, all technical and scientific terms used in the present application have the same meanings as those commonly understood by those of ordinary skill in the technical field to which the present application belongs.

[0110] In the present invention, unless otherwise stated, the orientation words such as "upper, lower, top, bottom" are generally in reference to the directions shown in the drawings, or in reference to the vertical, perpendicular or gravitational directions of the components themselves; similarly, for ease of understanding and description, "inner, outer" refer to the inner and outer of the contours of the components themselves, but the above orientation words are not used to limit the present invention.

[0111] It should be noted that in this specification, the expressions of the first, second, third, etc. are only used to distinguish one feature from another feature, and do not represent any limitation on the features. Therefore, without departing from the teachings of the present application, the first lens discussed below may also be referred to as the second lens or the third lens.

[0112] In the drawings, for ease of illustration, the thickness, dimensions and shapes of the lenses have been slightly exaggerated. Specifically, the spherical or aspherical shapes shown in the drawings are shown by way of example. That is, the spherical or aspherical shapes are not limited to the spherical or aspherical shapes shown in the drawings. The drawings are only examples and are not drawn strictly to scale.

[0113] In this text, the paraxial region refers to the region near the optical axis. If the lens surface is convex and the position of the convex surface is not defined, it means that the lens surface is convex at least in the paraxial region; if the lens surface is concave and the position of the concave surface is not defined, it means that the lens surface is concave at least in the paraxial region. The surface of each lens closer to the object side is called the first side of the lens, and the surface of each lens closer to the image side is called the second side of the lens. The judgment of the surface shape in the paraxial region can be based on the judgment method of those with ordinary knowledge in this field, and the concavity and convexity are judged by the positive and negative values of the R value (the R value refers to the radius of curvature in the paraxial region, usually the R value on the lens database (lens data) in optical software). For the first side, when the R value is positive, it is judged as convex, and when the R value is negative, it is judged as concave; for the second side, when the R value is positive, it is judged as concave, and when the R value is negative, it is judged as convex.

[0114] This application generally protects ordinary optical lenses. In the attached drawings, the left side is the object side and the right side is the image side, that is, the first side is the object side surface and the second side is the image side surface.

[0115] In an exemplary embodiment, the optical lens provided by this application can be used as, for example, a vehicle-mounted lens. The light rays from the object side can form an image on the image side.

[0116] When the optical lens in this application is applied to a projection lens or a radar transmitting lens, the left side is the imaging side and the right side is the image source side. In an exemplary embodiment, the optical lens provided by this application can be used as, for example, a projection lens or a lidar transmitting end lens. At this time, the image side of the optical lens can be the image source side, and the object side can be the imaging side. The light rays from the image source side can form an image on the imaging side. The imaging surface of the optical lens is the image source surface.

[0117] The main purpose of the present invention is to provide an optical lens and an electronic device having the same, so as to solve the problem that it is difficult to balance the miniaturization, long back focal length, low sensitivity, and small distortion of the optical lens in the prior art.

[0118] Embodiment 1

[0119] As Figures 1 to 16 shown, the optical lens includes a first lens, a second lens, a third lens, a fourth lens, and a fifth lens. The first lens has a positive optical power, and the first side of the first lens is convex; the second lens has a negative optical power, and the first side of the second lens is concave; the third lens has a positive optical power; the fourth lens has a positive optical power, and the second side of the fourth lens is convex; the fifth lens has a positive optical power, and the first side of the fifth lens is convex.

[0120] By setting the first lens to have a positive focal power, it has a converging effect on light rays, can effectively converge the central and marginal light rays of each field of view, and increase the system illuminance. By setting the first side of the first lens to be convex, it has an elegant appearance in actual use and is not prone to dust accumulation.

[0121] Optionally, the second side of the first lens is convex, which is beneficial for converging the marginal field-of-view light rays and flattening the light ray trend.

[0122] Certainly, the second side of the first lens can also be set to be flat, which is beneficial for maintaining the light ray trend and smoothly entering the second lens after passing through the air gap.

[0123] Certainly, the second side of the first lens can also be set to be concave, which is beneficial for reducing the aperture of the rear lens group and reducing the volume of the entire lens.

[0124] By setting the second lens to have a negative focal power, the light rays are further diverged, the light ray deflection angle is adjusted, and the double-concave shape is beneficial for reducing the system sensitivity. By setting the first side of the second lens to be concave, in cooperation with the first lens, the marginal field-of-view light rays are collected and converged.

[0125] Optionally, the second side of the second lens is concave, which reduces the light ray deflection angle, is beneficial for flattening the light ray trend, and reduces the sensitivity.

[0126] Certainly, the second side of the second lens can also be set to be convex, which converges the light rays, is beneficial for reducing the converging pressure of the rear optical system, and reasonably distributes the focal power.

[0127] Certainly, the second side of the second lens can also be set to be flat, maintaining the light ray divergence situation, requiring the rear optical system to re-converge the light rays, which is beneficial for lengthening the optical back focal length.

[0128] By setting the third lens to have a positive focal power, it has a converging effect on light rays, enables the light ray trend to smoothly transition into the fourth lens, and reduces the sensitivity of the rear optical system.

[0129] Optionally, the first side of the third lens is concave, and the second side of the third lens is convex, that is, the third lens is a meniscus lens convex towards the second side. The concave first side of the third lens is beneficial for collecting the light rays passing through the second lens. The convex second side of the third lens can converge the light rays, enable the light ray trend to smoothly transition into the fourth lens, reduce the light ray divergence angle, and reduce the system sensitivity.

[0130] Certainly, the first side of the third lens can also be set to be convex, and the second side of the third lens can be set to be concave, that is, the third lens is a meniscus lens convex towards the first side, which is beneficial for the light rays to smoothly transition and reduce the sensitivity.

[0131] Of course, the first side of the third lens can also be set as a plane, and the second side of the third lens can be set as a convex surface, which is beneficial to the smooth transition of the light path into the fourth lens, reducing the light divergence angle and lowering the system sensitivity.

[0132] By setting the fourth lens to have a positive focal power, it has a converging effect on light. By setting the second side of the fourth lens as a convex surface, the light can be converged, enabling the light path to smoothly transition into the fifth lens, reducing the light divergence angle and lowering the system sensitivity.

[0133] Optionally, the first side of the fourth lens is a concave surface, that is, the fourth lens is a meniscus lens convex towards the second side, which is beneficial for the gentle transition of light and reduces the sensitivity.

[0134] Of course, the first side of the fourth lens can also be set as a convex surface, which can effectively converge the central light and marginal light of each field of view, increasing the system illuminance.

[0135] Of course, the first side of the fourth lens can also be set as a plane, which is beneficial for the smooth transition of the light from the third lens.

[0136] By setting the fifth lens to have a positive focal power, it has a converging effect on light, which can effectively converge the central light and marginal light of each field of view, increasing the system illuminance. By setting the first side of the fifth lens as a convex surface, it is beneficial for converging light and increasing the system illuminance.

[0137] Optionally, the second side of the fifth lens is a concave surface, which further changes the light deflection angle, improves the telecentricity of the chief ray, and converges the light onto the image plane.

[0138] Of course, the second side of the fifth lens can also be set as a convex surface, which is beneficial for elongating the back focal length, facilitating the assembly of the module and the focal length adjustment.

[0139] Of course, the second side of the fifth lens can also be set as a plane, which is beneficial for the smooth transition of light to the image plane, effectively converging the central light and marginal light of each field of view, and increasing the system illuminance.

[0140] Optionally, the first lens is an aspherical lens; of course, the first lens and the second lens can also both be aspherical lenses. Using aspherical lenses can adjust the light path and reduce aberration, thereby improving the resolution. For example, using both the first lens and the third lens as aspherical lenses can better adjust the light path of the marginal light, enabling it to be better focused after passing through the subsequent lens groups. Preferably, glass aspherical lenses are used, as glass aspherical lenses have good thermal stability. Of course, in combination with the application of a projection system, when the operating environment is not high temperature, the first lens can be made of plastic material, which is beneficial for maintaining performance while reducing costs and weight.

[0141] In this embodiment, the second side surface of the first lens has an inflection point, which is beneficial to balancing the aberrations of the central field of view and the peripheral field of view and improving the resolution.

[0142] In this embodiment, the radian value θ of the maximum field of view angle of the optical lens, the overall focal length F of the optical lens, and the image height H corresponding to the maximum field of view angle of the optical lens satisfy: |(H - F*θ) / (F*θ)| ≤ 0.15. By restricting |(H - F*θ) / (F*θ)| ≤ 0.15, while keeping the field of view angle and the size of the imaging surface of the lens unchanged, increasing the focal length of the lens can highlight the imaging effect in the central area of the imaging surface, and achieve smaller distortion while ensuring high resolution. Preferably, |(H - F*θ) / (F*θ)| ≤ 0.08. By restricting |(H - F*θ) / (F*θ)| within the preferred range, it is beneficial to obtain a better central imaging effect and smaller distortion.

[0143] In this embodiment, the back focal length BFL of the optical lens and the overall length TTL of the optical lens satisfy: BFL / TTL ≥ 0.3. By restricting BFL / TTL ≥ 0.3, the special requirements for the back focal length of the optical lens are met, and space can also be reserved for the installation and focusing of optical elements to avoid mechanical interference. Preferably, BFL / TTL ≥ 0.32. By restricting BFL / TTL within the preferred range, it is beneficial to further meet the requirements for the back focal length.

[0144] In this embodiment, the back focal length BFL of the optical lens and the length TL of the lens group of the optical lens satisfy: BFL / TL ≥ 0.35. By restricting BFL / TL ≥ 0.35, the special requirements for the back focal length of the optical lens are met, and space can also be reserved for the installation and focusing of optical elements to avoid mechanical interference. Preferably, BFL / TL ≥ 0.4. By restricting BFL / TL within the preferred range, it is beneficial to further meet the requirements for the back focal length.

[0145] In this embodiment, the overall focal length F of the optical lens and the image height H corresponding to the maximum field of view angle of the optical lens satisfy: F / H ≥ 1.5. By restricting F / H ≥ 1.5, the ratio of the system focal length to the image height is determined according to the range of the field of view. When the focal length is greater than the image height, it is beneficial to reduce the aberration of the peripheral light rays passing through the optical system, thereby improving the resolution. Preferably, F / H ≥ 2.5, preferably, F / H ≥ 3, and more preferably, 5 ≥ F / H ≥ 2.5. By restricting F / H within the preferred range, the peripheral aberration can be further reduced and higher resolution can be obtained.

[0146] In this embodiment, the overall focal length F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy: F / ENPD ≤ 1.7. By restricting F / ENPD ≤ 1.7, that is, controlling the optical lens to have a small FNO, it is beneficial to increase the light passing amount. Preferably, 0.5 ≤ F / ENPD ≤ 1.5. By restricting F / ENPD within the preferred range, it is beneficial to further improve the light passing amount.

[0147] In this embodiment, the overall focal length F of the optical lens and the effective aperture DST of the diaphragm of the optical lens satisfy: DST / F ≥ 0.25. By restricting DST / F ≥ 0.25, the ratio of the diaphragm aperture to the effective focal length is larger, and the lens aperture is larger. Preferably, DST / F ≥ 0.5, and more preferably, 5 ≥ DST / F ≥ 0.4. By restricting DST / F within the preferred range, the optical lens can have a larger aperture.

[0148] In this embodiment, the maximum field of view FOV of the optical lens, the overall focal length F of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy: (FOV × F) / H ≥ 45. By restricting (FOV × F) / H ≥ 45, it is possible to simultaneously satisfy large angular resolution and a large field of view. Preferably, (FOV × F) / H ≥ 50. By restricting (FOV × F) / H within the preferred range, it is beneficial for the optical lens to further increase the field of view.

[0149] In this embodiment, the radian value θ of the maximum field of view of the optical lens, the overall focal length F of the optical lens, and the image height H corresponding to the maximum field of view of the optical lens satisfy: (H / 2) / (F * tan(θ / 2)) ≤ 1.8. By restricting (H / 2) / (F * tan(θ / 2)) ≤ 1.8, the ratio of the actual image height to the ideal image height is controlled, which is beneficial for achieving large angular resolution. Preferably, (H / 2) / (F * tan(θ / 2)) ≤ 1.4. By restricting (H / 2) / (F * tan(θ / 2)) within the preferred range, the angular resolution is improved.

[0150] In this embodiment, the radius of curvature R1 of the first side of the first lens and the focal length F1 of the first lens satisfy: R1 / F ≤ 6. By restricting R1 / F ≤ 6, the trend of the chief ray after entering the lens is adjusted so that its image height on the imaging plane is close to the ideal image height, which is beneficial for achieving small distortion. Preferably, R1 / F ≤ 4.5. By restricting R1 / F within the preferred range, the optical lens can have smaller distortion and further improve the image quality.

[0151] In this embodiment, the combined focal length F12 of the first lens and the second lens and the overall focal length F of the optical lens satisfy: F12 / F ≤ -0.5. By restricting F12 / F ≤ -0.5, the combined focal length of the first lens and the second lens is reasonably allocated, such that the combined focal length of the first lens and the second lens is negative, which is conducive to the light with a large field of view angle diverging to the rear system after entering the optical system, thereby increasing the back focal length of the system. Preferably, -15 ≤ F12 / F ≤ -1. By restricting F12 / F within the preferred range, a longer back focal length characteristic can be achieved.

[0152] In this embodiment, the overall focal length F of the optical lens and the combined focal length F34 of the third lens and the fourth lens satisfy: F34 / F ≤ 2. By restricting F34 / F ≤ 2, the combined focal length of the third lens and the fourth lens is reasonably allocated, such that the combined focal length of the third lens and the fourth lens is small, and the light diverged by the second lens for the large field of view is converged. Preferably, F34 / F ≤ 1.5. By restricting F34 / F within the preferred range, it is beneficial to further converge the light and improve the resolution.

[0153] In this embodiment, the air gap d2 between the first lens and the second lens on the optical axis of the optical lens and the lens group length TL of the optical lens satisfy: d2 / TL ≥ 0.05. By restricting d2 / TL ≥ 0.05, the air gap between the first lens and the second lens is elongated, such that the trend of the marginal rays is gentle. Preferably, 1.5 ≥ d2 / TL ≥ 0.15, and more preferably, d2 / TL ≥ 0.2. By restricting d2 / TL within the preferred or more preferred range, a more gentle ray trend can be obtained.

[0154] In this embodiment, the sag SAG8 of the second side of the fourth lens, the sag SAG9 of the first side of the fifth lens, the maximum effective aperture D8 of the second side of the fourth lens corresponding to the maximum field of view angle of the optical lens, and the maximum effective aperture D9 of the first side of the fifth lens corresponding to the maximum field of view angle of the optical lens satisfy: -3.2 ≤ (SAG8 / D8) / (SAG9 / D9) ≤ -0.5. By restricting -3.2 ≤ (SAG8 / D8) / (SAG9 / D9) ≤ -0.5, the included angle between the second side of the fourth lens and the first side of the fifth lens is close, such that the light passing through the fourth lens enters the fifth lens gently, which is beneficial to reducing the lens sensitivity. Preferably, -2.7 ≤ (SAG8 / D8) / (SAG9 / D9) ≤ -0.7. By restricting (SAG8 / D8) / (SAG9 / D9) within the preferred range, a more gentle ray trend can be obtained, and the lens sensitivity can be further reduced.

[0155] In this embodiment, the focal length F2 of the second lens and the combined focal length F34 of the third lens and the fourth lens satisfy: -2 ≤ F2 / F34 ≤ -0.2. By restricting -2 ≤ F2 / F34 ≤ -0.2, by controlling the ratio of the focal length of the second lens to the combined focal length of the third lens and the fourth lens to be similar, and the second lens has a negative focal length while the combination of the third lens and the fourth lens has a positive focal length, the aberration is corrected by positive and negative compensation. Preferably, -1.5 ≤ F2 / F34 ≤ -0.5. By restricting F2 / F34 within the preferred range, the optical lens has smaller aberration.

[0156] In this embodiment, the included angle arctan(1 / K(S3)) of the first side of the second lens satisfies: arctan(1 / K(S3)) ≤ -8. By restricting arctan(1 / K(S3)) ≤ -8, the included angle of the first side of the second lens is larger, which is beneficial for the rapid focusing of the large-angle peripheral light entering through the first lens and improving the imaging quality. Preferably, arctan(1 / K(S3)) ≤ -13, and more preferably, -50 ≤ arctan(1 / K(S3)) ≤ -13. By restricting arctan(1 / K(S3)) within the preferred range, it is beneficial for the optical lens to have higher imaging quality.

[0157] In this embodiment, the sagittal height SAG3 of the first side of the second lens and the maximum effective clear aperture D3 of the first side of the third lens corresponding to the maximum field of view angle of the optical lens satisfy: -0.16 ≤ SAG3 / D3 ≤ -0.02. By restricting -0.16 ≤ SAG3 / D3 ≤ -0.02, the smaller the ratio of the sagittal height of the first side of the second lens to the maximum effective clear aperture of the first side of the third lens corresponding to the maximum field of view angle of the optical lens, the smaller the deflection degree of the large-angle light, which is beneficial for the smooth entry of the marginal field light. Preferably, -0.14 ≤ SAG3 / D3 ≤ -0.05. By restricting SAG3 / D3 within the preferred range, a smoother light trend can be obtained.

[0158] In this embodiment, the radius of curvature R9 of the first side of the fifth lens and the overall focal length F of the optical lens satisfy: 0.2 ≤ R9 / F ≤ 8. By restricting 0.2 ≤ R9 / F ≤ 8, the fixed fluctuation range of the focal length of the fifth lens is obtained, which is beneficial for the smooth entry of light into the fifth lens and lengthening the back focal length. Preferably, 0.4 ≤ R9 / F ≤ 5. By restricting R9 / F within the preferred range, it is beneficial for the optical lens to have a longer back focal length.

[0159] In this embodiment, the Abbe number Vd3 of the third lens and the Abbe number Vd4 of the fourth lens satisfy: 0.1 ≤ Vd3 / Vd4 ≤ 2. By restricting 0.1 ≤ Vd3 / Vd4 ≤ 2, it is beneficial to reduce chromatic aberration by controlling the compensation of the high and low Abbe numbers of the third lens and the fourth lens. Preferably, 0.3 ≤ Vd3 / Vd4 ≤ 1.5. By restricting Vd3 / Vd4 within the preferred range, it is beneficial to further reduce chromatic aberration.

[0160] In this embodiment, the radius of curvature R1 of the first side of the first lens and the radius of curvature R2 of the second side of the first lens satisfy: |R1 / R2| ≤ 4. By restricting |R1 / R2| ≤ 4, the smaller the ratio of R1 / R2, the lower the degree of deflection of the second side of the first lens for the marginal field light rays, which is beneficial to the gentle trend of the light rays, thereby reducing sensitivity. Preferably, |R1 / R2| ≤ 3.5. By restricting |R1 / R2| within the preferred range, a more gentle light ray trend can be obtained.

[0161] In this embodiment, the overall focal length F of the optical lens and the focal length F1 of the first lens satisfy: F1 / F ≥ 0.5. By restricting F1 / F ≥ 0.5, reasonably increasing the proportion of the focal length of the first lens in the overall focal length of the lens is beneficial to adjusting the deflection of the central light rays and marginal light rays of each field of view, and facilitating the collection of large field of view angle light rays. Preferably, F1 / F ≥ 1, and more preferably, 5 ≥ F1 / F ≥ 1. By restricting F1 / F within the preferred range, it is beneficial to obtain a better imaging effect for a large field of view.

[0162] In this embodiment, the overall focal length F of the optical lens and the focal length F2 of the second lens satisfy: F2 / F ≤ 0. By restricting F2 / F ≤ 0, by setting the second lens as a negative lens and simultaneously controlling the proportion of the focal length of the second lens in the overall focal length of the lens, it is beneficial to diverge light rays and achieve a long back focal length. Preferably, -7 ≤ F2 / F ≤ -0.3. By restricting F2 / F within the preferred range, it is beneficial for the optical lens to have a longer back focal length.

[0163] In this embodiment, the central thickness d6 of the third lens and the central thickness d8 of the fourth lens satisfy: d6 / d8 ≤ 2. By restricting d6 / d8 ≤ 2, since the third lens is a meniscus lens, by controlling the relatively small ratio of the central thicknesses of the third lens and the fourth lens, it is beneficial to reduce the divergence angle of the light rays after exiting the third lens and ensure that the fourth lens is not too thin, facilitating the collection of light rays by the fourth lens and the gentle entry of light rays. Preferably, d6 / d8 ≤ 1.5. By restricting d6 / d8 within the preferred range, it is beneficial to further reduce the lens sensitivity.

[0164] Embodiment 2

[0165] As Figures 1 to 16As shown, the optical lens includes a first lens, a second lens, a third lens, a fourth lens, and a fifth lens. The first lens has a positive focal power; the second lens has a negative focal power; the third lens has a positive focal power; the fourth lens has a positive focal power; the fifth lens has a positive focal power. Among them, the following condition is satisfied between the back focal length (BFL) of the optical lens and the total track length (TTL) of the optical lens: BFL / TTL≥0.3.

[0166] By setting the first lens to have a positive focal power, it has a converging effect on light rays, can effectively converge the central and marginal light rays of each field of view, and increase the system illuminance. By setting the second lens to have a negative focal power, the light rays are further diverged to adjust the light ray deflection angle, and the double concave shape is beneficial to reducing the system sensitivity. By setting the third lens to have a positive focal power, it has a converging effect on light rays, enables the light ray trend to smoothly transition into the fourth lens, and reduces the sensitivity of the rear optical system. By setting the fourth lens to have a positive focal power, it has a converging effect on light rays. By setting the fifth lens to have a positive focal power, it has a converging effect on light rays, can effectively converge the central and marginal light rays of each field of view, and increase the system illuminance. By restricting BFL / TTL≥0.3, the special requirements for the back focal length of the optical lens are met, and space can also be reserved for the installation and focusing of optical elements to avoid mechanical interference.

[0167] Preferably, BFL / TTL≥0.3. By restricting BFL / TTL within the preferred range, it is beneficial to further meet the requirements of the back focal length.

[0168] By setting the first side of the first lens to be convex, it has a beautiful appearance in actual use and is not easy to accumulate dust. Optionally, the second side of the first lens is convex, which is beneficial to converging the marginal field of view light rays and smoothing the light ray trend. Of course, the second side of the first lens can also be set to be flat, which is beneficial to maintaining the light ray trend and smoothly entering the second lens after passing through the air gap. Of course, the second side of the first lens can also be set to be concave, which is beneficial to reducing the aperture of the rear lens group and reducing the volume of the entire lens.

[0169] By setting the first side of the second lens to be concave, in cooperation with the first lens, it collects and converges the marginal field of view light rays. Optionally, the second side of the second lens is concave, which reduces the light ray deflection angle, is beneficial to smoothing the light ray trend, and reduces the sensitivity. Of course, the second side of the second lens can also be set to be convex, which converges the light rays, is beneficial to reducing the converging pressure of the rear optical system, and reasonably distributes the focal power. Of course, the second side of the second lens can also be set to be flat, maintaining the light ray divergence situation, and requiring the rear optical system to re-converge the light rays, which is beneficial to lengthening the optical back focal length.

[0170] Optionally, the first side of the third lens is concave and the second side of the third lens is convex, that is, the third lens is a meniscus lens convex toward the second side. The concave first side of the third lens is conducive to collecting the light passing through the second lens. The convex second side of the third lens can converge the light, enabling the light to smoothly transition into the fourth lens, reducing the light divergence angle, and lowering the system sensitivity. Of course, it is also possible to set the first side of the third lens to be convex and the second side of the third lens to be concave, that is, the third lens is a meniscus lens convex toward the first side, which is conducive to the smooth transition of light and reduces the sensitivity. Of course, it is also possible to set the first side of the third lens to be flat and the second side of the third lens to be convex, which is conducive to the smooth transition of the light into the fourth lens, reducing the light divergence angle, and lowering the system sensitivity.

[0171] By setting the second side of the fourth lens to be convex, the light can be converged, enabling the light to smoothly transition into the fifth lens, reducing the light divergence angle, and lowering the system sensitivity. Optionally, the first side of the fourth lens is concave, that is, the fourth lens is a meniscus lens convex toward the second side, which is conducive to the smooth transition of light and reduces the sensitivity. Of course, it is also possible to set the first side of the fourth lens to be convex, which can effectively converge the central light and marginal light of each field of view, increasing the system illuminance. Of course, it is also possible to set the first side of the fourth lens to be flat, which is conducive to the smooth transition of the light from the third lens.

[0172] By setting the first side of the fifth lens to be convex, it is conducive to converging the light and increasing the system illuminance. Optionally, the second side of the fifth lens is concave, further changing the light deflection angle, improving the telecentricity of the chief ray, and converging the light onto the image plane. Of course, it is also possible to set the second side of the fifth lens to be convex, which is conducive to the elongation of the back focal length, facilitating the assembly of the module and the adjustment of the focal length. Of course, it is also possible to set the second side of the fifth lens to be flat, which is conducive to the smooth transition of the light to the image plane, effectively converging the central light and marginal light of each field of view, and increasing the system illuminance.

[0173] Optionally, the first lens is an aspherical lens; of course, it is also possible to select both the first lens and the second lens to be aspherical lenses. Using aspherical lenses can adjust the light path and reduce aberration, thereby improving the resolution. For example, using both the first lens and the third lens as aspherical lenses can better adjust the path of the marginal light, enabling it to be better focused after passing through the subsequent lens group. Preferably, a glass aspherical lens is used, and the glass aspherical has good thermal stability. Of course, in combination with the application of a projection system, when the use environment is not high temperature, the first lens can be made of plastic material, which is conducive to maintaining performance while reducing cost and weight.

[0174] In this embodiment, the second side of the first lens has an inflection point. This is conducive to balancing the aberration of the central field of view and the marginal field of view and improving the resolution.

[0175] In this embodiment, the radian value θ of the maximum field of view angle of the optical lens, the overall focal length F of the optical lens, and the image height H corresponding to the maximum field of view angle of the optical lens satisfy: |(H - F*θ) / (F*θ)| ≤ 0.15. By restricting |(H - F*θ) / (F*θ)| ≤ 0.15, while keeping the field of view angle and the size of the imaging surface of the lens unchanged, increasing the focal length of the lens can highlight the imaging effect in the central area of the imaging surface of the lens, and achieve smaller distortion while ensuring high resolution. Preferably, |(H - F*θ) / (F*θ)| ≤ 0.08. By restricting |(H - F*θ) / (F*θ)| within the preferred range, it is beneficial to obtain a better central imaging effect and smaller distortion.

[0176] In this embodiment, the back focal length BFL of the optical lens and the length TL of the lens group of the optical lens satisfy: BFL / TL ≥ 0.35. By restricting BFL / TL ≥ 0.35, the special requirements for the back focal length of the optical lens are met, and space can also be reserved for the installation and focusing of optical elements to avoid mechanical interference. Preferably, BFL / TL ≥ 0.4. By restricting BFL / TL within the preferred range, it is beneficial to further meet the requirements of the back focal length.

[0177] In this embodiment, the overall focal length F of the optical lens and the image height H corresponding to the maximum field of view angle of the optical lens satisfy: F / H ≥ 1.5. By restricting F / H ≥ 1.5, the ratio of the system focal length to the image height is determined according to the range of the field of view. When the focal length is greater than the image height, it is beneficial to reduce the aberration of the marginal rays passing through the optical system, thereby improving the resolution. Preferably, F / H ≥ 2.5, and more preferably, 5 ≥ F / H ≥ 2.5. By restricting F / H within the preferred range, the marginal aberration can be further reduced, and higher resolution can be obtained.

[0178] In this embodiment, the overall focal length F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy: F / ENPD ≤ 1.7. By restricting F / ENPD ≤ 1.7, that is, controlling the optical lens to have a small FNO, it is beneficial to increase the light passing amount. Preferably, 0.5 ≤ F / ENPD ≤ 1.5. By restricting F / ENPD within the preferred range, it is beneficial to further improve the light passing amount.

[0179] In this embodiment, the overall focal length F of the optical lens and the effective aperture DST of the diaphragm of the optical lens satisfy: DST / F ≥ 0.25. By restricting DST / F ≥ 0.25, the ratio of the diaphragm aperture to the effective focal length is large, so the aperture of the lens is larger. Preferably, DST / F ≥ 0.4, and more preferably, 5 ≥ DST / F ≥ 0.4. By restricting DST / F within the preferred range, the optical lens can have a larger aperture.

[0180] In this embodiment, the following relationship is satisfied among the maximum field of view angle FOV of the optical lens, the overall focal length F of the optical lens, and the image height H corresponding to the maximum field of view angle of the optical lens: (FOV × F) / H ≥ 45. By restricting (FOV × F) / H ≥ 45, both large angular resolution and large field of view angle can be satisfied simultaneously. Preferably, (FOV × F) / H ≥ 50. By restricting (FOV × F) / H within the preferred range, it is beneficial for the optical lens to further increase the field of view angle.

[0181] In this embodiment, the following relationship is satisfied among the radian value θ of the maximum field of view angle of the optical lens, the overall focal length F of the optical lens, and the image height H corresponding to the maximum field of view angle of the optical lens: (H / 2) / (F * tan(θ / 2)) ≤ 1.8. By restricting (H / 2) / (F * tan(θ / 2)) ≤ 1.8, the ratio of the actual image height to the ideal image height is controlled, which is beneficial for achieving large angular resolution. Preferably, (H / 2) / (F * tan(θ / 2)) ≤ 1.4. By restricting (H / 2) / (F * tan(θ / 2)) within the preferred range, the angular resolution is improved.

[0182] In this embodiment, the following relationship is satisfied between the curvature radius R1 of the first side of the first lens and the focal length F1 of the first lens: R1 / F ≤ 6. By restricting R1 / F ≤ 6, the trend of the chief ray after entering the lens is adjusted so that its image height on the imaging surface is close to the ideal image height, which is beneficial for achieving small distortion. Preferably, R1 / F ≤ 4.5. By restricting R1 / F within the preferred range, the optical lens can have smaller distortion and further improve the image quality.

[0183] In this embodiment, the following relationship is satisfied between the combined focal length F12 of the first lens and the second lens and the overall focal length F of the optical lens: F12 / F ≤ -0.5. By restricting F12 / F ≤ -0.5, the combined focal length of the first lens and the second lens is reasonably distributed, making the combined focal length of the first lens and the second lens negative, which is beneficial for the light rays with a large field of view to diverge to the rear system after entering the optical system, thereby increasing the back focal length of the system. Preferably, -15 ≤ F12 / F ≤ -1. By restricting F12 / F within the preferred range, a longer back focal length characteristic can be achieved.

[0184] In this embodiment, the following relationship is satisfied between the overall focal length F of the optical lens and the combined focal length F34 of the third lens and the fourth lens: F34 / F ≤ 2. By restricting F34 / F ≤ 2, the combined focal length of the third lens and the fourth lens is reasonably distributed, making the combined focal length of the third lens and the fourth lens smaller, and converging the light rays diverged by the second lens for a large field of view. Preferably, F34 / F ≤ 1.5. By restricting F34 / F within the preferred range, it is beneficial for further converging the light rays and improving the resolution.

[0185] In this embodiment, the air gap d2 between the first lens and the second lens on the optical axis of the optical lens and the lens group length TL of the optical lens satisfy: d2 / TL≥0.05. By restricting d2 / TL≥0.05, the air gap between the first lens and the second lens is elongated, making the marginal ray trend gentle. Preferably, 1.5≥d2 / TL≥0.15. By restricting d2 / TL within the preferred range, a more gentle ray trend can be obtained.

[0186] In this embodiment, the sag SAG8 of the second side of the fourth lens, the sag SAG9 of the first side of the fifth lens, the maximum effective aperture D8 of the second side of the fourth lens corresponding to the maximum field of view angle of the optical lens, and the maximum effective aperture D9 of the first side of the fifth lens corresponding to the maximum field of view angle of the optical lens satisfy: -3.2≤(SAG8 / D8) / (SAG9 / D9)≤-0.5. By restricting -3.2≤(SAG8 / D8) / (SAG9 / D9)≤-0.5, the included angle between the second side of the fourth lens and the first side of the fifth lens is close, making the light passing through the fourth lens enter the fifth lens gently, which is beneficial to reducing the lens sensitivity. Preferably, -2.7≤(SAG8 / D8) / (SAG9 / D9)≤-0.7. By restricting (SAG8 / D8) / (SAG9 / D9) within the preferred range, a more gentle ray trend can be obtained, further reducing the lens sensitivity.

[0187] In this embodiment, the focal length F2 of the second lens and the combined focal length F34 of the third lens and the fourth lens satisfy: -2≤F2 / F34≤-0.2. By restricting -2≤F2 / F34≤-0.2, by controlling the ratio of the focal length of the second lens to the combined focal length of the third lens and the fourth lens to be similar, and the second lens has a negative focal length while the combination of the third lens and the fourth lens has a positive focal length, the aberration is corrected by positive and negative compensation. Preferably, -1.5≤F2 / F34≤-0.5. By restricting F2 / F34 within the preferred range, the optical lens has smaller aberration.

[0188] In this embodiment, the included angle arctan(1 / K(S3)) of the first side of the second lens satisfies: arctan(1 / K(S3))≤-8. By restricting arctan(1 / K(S3))≤-8, the first side of the second lens has a larger included angle, which is beneficial to the rapid focusing of the large-angle peripheral light entering through the first lens and improving the imaging quality. Preferably, arctan(1 / K(S3))≤-28, and more preferably, -50≤arctan(1 / K(S3))≤-13. By restricting arctan(1 / K(S3)) within the preferred range, it is beneficial for the optical lens to have higher imaging quality.

[0189] In this embodiment, the sagittal height SAG3 of the first side surface of the second lens and the maximum effective clear aperture D3 of the first side surface of the third lens corresponding to the maximum field of view angle of the optical lens satisfy: -0.16 ≤ SAG3 / D3 ≤ -0.02. By restricting -0.16 ≤ SAG3 / D3 ≤ -0.02, the smaller the ratio of the sagittal height of the first side surface of the second lens to the maximum effective clear aperture of the first side surface of the third lens corresponding to the maximum field of view angle of the optical lens, the smaller the deflection degree of the large-angle light, which is beneficial to the smooth entry of the marginal field light. Preferably, -0.14 ≤ SAG3 / D3 ≤ -0.05. By restricting SAG3 / D3 within the preferred range, a smoother light trend can be obtained.

[0190] In this embodiment, the radius of curvature R9 of the first side surface of the fifth lens and the overall focal length F of the optical lens satisfy: 0.2 ≤ R9 / F ≤ 8. By restricting 0.2 ≤ R9 / F ≤ 8, the fixed fluctuation range of the focal length of the fifth lens is obtained, which is beneficial to the smooth entry of light into the fifth lens and the elongation of the back focal length. Preferably, 0.4 ≤ R9 / F ≤ 5. By restricting R9 / F within the preferred range, it is beneficial for the optical lens to have a longer back focal length.

[0191] In this embodiment, the Abbe number Vd3 of the third lens and the Abbe number Vd4 of the fourth lens satisfy: 0.1 ≤ Vd3 / Vd4 ≤ 2. By restricting 0.1 ≤ Vd3 / Vd4 ≤ 2, it is beneficial to reduce chromatic aberration by controlling the compensation of the high and low Abbe numbers of the third lens and the fourth lens. Preferably, 0.3 ≤ Vd3 / Vd4 ≤ 1.5. By restricting Vd3 / Vd4 within the preferred range, it is beneficial to further reduce chromatic aberration.

[0192] In this embodiment, the radius of curvature R1 of the first side surface of the first lens and the radius of curvature R2 of the second side surface of the first lens satisfy: |R1 / R2| ≤ 4. By restricting |R1 / R2| ≤ 4, the smaller the ratio of R1 / R2, the lower the deflection degree of the second side surface of the first lens on the marginal field light, which is beneficial to the smooth light trend and thus reduces the sensitivity. Preferably, |R1 / R2| ≤ 3.5. By restricting |R1 / R2| within the preferred range, a smoother light trend can be obtained.

[0193] In this embodiment, the overall focal length F of the optical lens and the focal length F1 of the first lens satisfy: F1 / F ≥ 0.5. By restricting F1 / F ≥ 0.5, the proportion of the focal length of the first lens in the overall focal length of the lens is reasonably increased, which is beneficial to adjusting the deflection of the central light and the marginal light of each field of view and facilitating the collection of large-field-angle light. Preferably, F1 / F ≥ 1, and more preferably, 5 ≥ F1 / F ≥ 1. By restricting F1 / F within the preferred range, it is beneficial to obtain a better imaging effect for a large field of view.

[0194] In this embodiment, the overall focal length F of the optical lens and the focal length F2 of the second lens satisfy: F2 / F ≤ 0. By restricting F2 / F ≤ 0, by setting the second lens as a negative lens and simultaneously controlling the proportion of the focal length of the second lens in the overall focal length of the lens, it is beneficial to diverge light and achieve a long back focal length. Preferably, -7 ≤ F2 / F ≤ -0.3. By restricting F2 / F within the preferred range, it is beneficial for the optical lens to have a longer back focal length.

[0195] In this embodiment, the central thickness d6 of the third lens and the central thickness d8 of the fourth lens satisfy: d6 / d8 ≤ 2. By restricting d6 / d8 ≤ 2, since the third lens is a meniscus lens, by controlling the relatively small ratio of the central thicknesses of the third lens and the fourth lens, it is beneficial to reduce the divergence angle of the light after it exits the third lens and ensure that the fourth lens is not too thin, facilitating the collection of light by the fourth lens and enabling the light to enter smoothly. Preferably, d6 / d8 ≤ 1.5. By restricting d6 / d8 within the preferred range, it is beneficial to further reduce lens sensitivity.

[0196] It should be noted that the overall length TTL of the optical lens is the axial distance from the first side of the first lens to the imaging surface of the optical lens, the optical back focal length BFL is the axial distance from the last lens to the imaging surface of the optical lens, and the lens group length TL of the optical lens is the axial distance from the first side of the first lens to the second side of the last lens.

[0197] Optionally, the above optical lens may further include a filter for correcting color deviation and a protective glass for protecting the photosensitive element located on the imaging surface.

[0198] It should be noted that the front aperture D of the optical lens in this application is the maximum clear aperture of the first side of the first lens corresponding to the maximum field of view angle of the optical lens.

[0199] The optical lens in this application can adopt multiple lenses, such as the five lenses mentioned above. In this application, at least one of the lens surfaces of each lens is an aspherical surface. The characteristics of an aspherical lens are that the curvature changes continuously from the center of the lens to the periphery of the lens. Different from a spherical lens with a constant curvature from the center of the lens to the periphery of the lens, an aspherical lens has better curvature radius characteristics and has the advantages of improving distortion aberration and astigmatism aberration. After using an aspherical lens, it is possible to eliminate the aberration that appears during imaging as much as possible, thereby improving the imaging quality. Specifically, when focusing on the imaging quality of the optical lens, the first lens to the fifth lens can all use aspherical lenses.

[0200] In an exemplary embodiment, the first lens to the fifth lens may all be glass lenses. An optical lens made of glass can suppress the shift of the back focus of the optical lens with temperature changes, so as to improve the system stability. At the same time, using glass material can avoid the blurring of the lens imaging caused by the temperature changes of high and low temperatures in the use environment, which affects the normal use of the lens. For example, an optical lens with a full glass design has a wide temperature range and can maintain stable optical performance in the range of -40°C to 105°C. Specifically, when focusing on the resolution quality and reliability, the first lens to the fifth lens may all be glass aspherical lenses. Of course, in application scenarios with lower temperature stability requirements, the first lens to the fifth lens in the optical lens may also all be made of plastic. Making the optical lens with plastic can effectively reduce the manufacturing cost. Of course, the first lens to the fifth lens in the optical lens may also be made of a combination of plastic and glass.

[0201] This application also provides an electronic device, including the above optical lens and an imaging element for converting the optical image formed by the optical lens into an electrical signal. The imaging element can be a charge-coupled device (CCD) or a complementary metal-oxide-semiconductor element (CMOS). The electronic device can be an independent imaging device such as a digital camera, or an imaging module integrated on a mobile electronic device such as a mobile phone. The electronic device is equipped with the optical lens described above.

[0202] However, those skilled in the art should understand that without departing from the technical solutions claimed in this application, the number of lenses constituting the optical lens can be changed to obtain the various results and advantages described in this specification. For example, although five lenses are described as an example in the embodiment, the optical lens is not limited to including five lenses. If necessary, the optical lens may also include other numbers of lenses.

[0203] The following further describes, with reference to the accompanying drawings, examples of the specific surface shapes and parameters of the optical lens applicable to the above embodiments.

[0204] Example 1

[0205] As Figure 1 shown, the optical lens sequentially includes a first lens L1, a stop STO, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a filter, and an imaging surface IMA from the object side to the image side.

[0206] The first lens L1 has a positive focal power. The first side S1 of the first lens is convex, and the second side S2 of the first lens is concave. The second lens L2 has a negative focal power. The first side S3 of the second lens is concave, and the second side S4 of the second lens is concave. The third lens L3 has a positive focal power. The first side S5 of the third lens is concave, and the second side S6 of the third lens is convex. The fourth lens L4 has a positive focal power. The first side S7 of the fourth lens is concave, and the second side S8 of the fourth lens is convex. The fifth lens has a positive focal power. The first side S9 of the fifth lens is convex, and the second side S10 of the fifth lens is concave. The filter has a first side S11 of the filter and a second side S12 of the filter. Light from the object sequentially passes through the surfaces S1 to S12 and finally forms an image on the imaging surface IMA.

[0207] In this example, the focal length F of the optical lens is 50.6700 mm, the total length TTL of the optical lens is 87.0012 mm, and the maximum field of view angle FOV of the optical lens is 15.6600°.

[0208] Table 1 shows the basic structural parameter table of the optical lens in Example 1. Among them, the unit of the radius of curvature Radius and the thickness Thickness / distance is millimeter (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity represents infinity.

[0209] Surf Radius Thickness Nd Vd 1 45.0233 6.3446 1.49 51.42 2 250.8598 5.9749 STO Infinity 12.6228 3 -40.2146 3.5006 1.85 23.79 4 2790.1404 1.3966 5 -198.9728 6.4392 1.77 49.60 6 -41.5140 0.5002 7 -556.2000 5.3643 1.61 56.65 8 -59.1914 1.0254 9 60.7601 5.1040 1.61 58.61 10 401.7989 37.3185 11 Infinity 1.1000 1.51 62.91 12 Infinity 0.3100 IMA / /

[0210] Table 1

[0211] In this example, the first lens is an aspherical lens. The surface profiles of the aspherical lenses can be defined by, but not limited to, the following aspherical formula:

[0212]

[0213] where x is the sagitta, the distance from the vertex of the aspherical surface at the position with a height of h along the optical axis direction; c is the paraxial curvature of the aspherical surface, c = 1 / R (that is, the paraxial curvature c is the reciprocal of the radius of curvature R in Table 1 above); k is the conic coefficient; A is the high-order term coefficient. Table 2 below shows the conic coefficient k and the high-order term coefficients A (4th-order term coefficient), B (6th-order term coefficient), and C (8th-order term coefficient) that can be used for the aspherical lens surfaces in this example.

[0214] Surf k A B C 1 0.8209 -9.3526E-08 5.3146E-09 1.8320E-12 2 16.8090 3.6865E-06 8.5306E-09 -2.6525E-13

[0215] Table 2

[0216] Example 2

[0217] As Figure 2As shown in the figure, the optical lens sequentially includes a first lens L1, a stop STO, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a filter, and an imaging surface IMA from the object side to the image side.

[0218] The first lens L1 has a positive optical power. The first surface S1 of the first lens is a convex surface, and the second surface S2 of the first lens is a concave surface. The second lens L2 has a negative optical power. The first surface S3 of the second lens is a concave surface, and the second surface S4 of the second lens is a concave surface. The third lens L3 has a positive optical power. The first surface S5 of the third lens is a concave surface, and the second surface S6 of the third lens is a convex surface. The fourth lens L4 has a positive optical power. The first surface S7 of the fourth lens is a concave surface, and the second surface S8 of the fourth lens is a convex surface. The fifth lens has a positive optical power. The first surface S9 of the fifth lens is a convex surface, and the second surface S10 of the fifth lens is a concave surface. The filter has a first surface S11 of the filter and a second surface S12 of the filter. Light from the object sequentially passes through the surfaces S1 to S12 and finally forms an image on the imaging surface IMA.

[0219] In this example, the focal length F of the optical lens is 50.6816 mm, the total length TTL of the optical lens is 87.0620 mm, and the maximum field of view FOV of the optical lens is 15.6600°.

[0220] Table 3 shows the basic structural parameter table of the optical lens in Example 2, where the unit of the radius of curvature Radius and the thickness Thickness / distance is millimeter (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity represents infinity.

[0221] Surf Radius Thickness Nd Vd 1 45.0153 6.3621 1.49 51.42 2 250.9677 5.9968 STO Infinity 12.6479 3 -40.2164 3.5129 1.85 23.79 4 2802.0289 1.4045 5 -198.9569 6.4459 1.77 49.60 6 -41.5146 0.5045 7 -555.9866 5.3774 1.61 56.65 8 -59.1915 1.0193 9 60.7625 5.0719 1.61 58.61 10 401.7241 37.3089 11 Infinity 1.1000 1.51 62.91 12 Infinity 0.3100 IMA / /

[0222] Table 3

[0223] In this example, the first lens is an aspherical lens. The surface shape of each aspherical lens can be defined by, but not limited to, formula (1) in Example 1.

[0224] Table 4 shows the conic coefficient k and the coefficients of each high-order term that can be used for the aspherical lens surface in this example.

[0225] Surf k A B C 1 0.8224 -8.7261E-08 5.3012E-09 1.7646E-12 2 16.7140 3.6861E-06 8.5221E-09 -2.9284E-13

[0226] Table 4

[0227] Example 3

[0228] As Figure 3 shown in the figure, the optical lens sequentially includes a first lens L1, a stop STO, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a filter, and an imaging surface IMA from the object side to the image side.

[0229] The first lens L1 has a positive focal power. The first side S1 of the first lens is convex, and the second side S2 of the first lens is concave. The second lens L2 has a negative focal power. The first side S3 of the second lens is concave, and the second side S4 of the second lens is flat. The third lens L3 has a positive focal power. The first side S5 of the third lens is concave, and the second side S6 of the third lens is convex. The fourth lens L4 has a positive focal power. The first side S7 of the fourth lens is concave, and the second side S8 of the fourth lens is convex. The fifth lens has a positive focal power. The first side S9 of the fifth lens is convex, and the second side S10 of the fifth lens is concave. The filter has a first side S11 of the filter and a second side S12 of the filter. The light from the object sequentially passes through the surfaces S1 to S12 and finally forms an image on the imaging surface IMA.

[0230] In this example, the focal length F of the optical lens is 50.6701 mm, the total length TTL of the optical lens is 87.0186 mm, and the maximum field of view FOV of the optical lens is 15.6600°.

[0231] Table 5 shows the basic structural parameter table of the optical lens in Example 3. Among them, the unit of the radius of curvature Radius and the thickness Thickness / distance is millimeter (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity represents infinity.

[0232] Surf Radius Thickness Nd Vd 1 44.9351 6.3572 1.49 51.42 2 233.3769 5.9929 STO Infinity 12.6390 3 -41.2378 3.5156 1.85 23.79 4 100000000.0000 1.3733 5 -176.9926 6.4153 1.77 49.60 6 -41.5939 0.5072 7 -500.1778 5.3653 1.61 56.65 8 -58.4244 1.0315 9 61.2667 5.0911 1.61 58.61 10 396.7532 37.3203 11 Infinity 1.1000 1.51 62.91 12 Infinity 0.3100 IMA / /

[0233] Table 5

[0234] In this example, the first lens is an aspherical lens. The surface shape of each aspherical lens can be defined by, but not limited to, formula (1) in Example 1.

[0235] Table 6 shows the conic coefficient k and the coefficients of each high-order term that can be used for the aspherical lens surface in this example.

[0236] Surf k A B C 1 0.8661 6.8389E-08 5.0362E-09 2.5568E-12 2 33.0620 3.8365E-06 9.1164E-09 -5.9484E-13

[0237] Table 6

[0238] Example 4

[0239] As Figure 4 shown, the optical lens sequentially includes a first lens L1, a diaphragm STO, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a filter, and an imaging surface IMA from the object side to the image side.

[0240] The first lens L1 has a positive focal power. The first side S1 of the first lens is convex, and the second side S2 of the first lens is concave. The second lens L2 has a negative focal power. The first side S3 of the second lens is concave, and the second side S4 of the second lens is flat. The third lens L3 has a positive focal power. The first side S5 of the third lens is concave, and the second side S6 of the third lens is convex. The fourth lens L4 has a positive focal power. The first side S7 of the fourth lens is concave, and the second side S8 of the fourth lens is convex. The fifth lens has a positive focal power. The first side S9 of the fifth lens is convex, and the second side S10 of the fifth lens is concave. The filter has a first side S11 and a second side S12 of the filter. Light from the object sequentially passes through the surfaces S1 to S12 and finally forms an image on the imaging surface IMA.

[0241] In this example, the focal length F of the optical lens is 50.6700 mm, the total length TTL of the optical lens is 87.0183 mm, and the maximum field of view FOV of the optical lens is 15.6600°.

[0242] Table 7 shows the basic structural parameter table of the optical lens in Example 4, where the unit of the radius of curvature Radius and the thickness Thickness / distance is millimeter (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity represents infinity.

[0243]

[0244]

[0245] Table 7

[0246] In this example, the first lens is an aspherical lens. The surface profile of each aspherical lens can be defined by, but not limited to, formula (1) in Example 1.

[0247] Table 8 shows the conic coefficient k and the coefficients of each high-order term that can be used for the aspherical lens surface in this example.

[0248] Surf k A B C 1 0.8661 6.8388E-08 5.0363E-09 2.5569E-12 2 33.0620 3.8365E-06 9.1164E-09 -5.9484E-13

[0249] Table 8

[0250] Example 5

[0251] As Figure 5 shown, the optical lens sequentially includes a first lens L1, a diaphragm STO, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a filter, and an imaging surface IMA from the object side to the image side.

[0252] The first lens L1 has a positive optical power. The first surface S1 of the first lens is convex, and the second surface S2 of the first lens is concave. The second lens L2 has a negative optical power. The first surface S3 of the second lens is concave, and the second surface S4 of the second lens is concave. The third lens L3 has a positive optical power. The first surface S5 of the third lens is convex, and the second surface S6 of the third lens is concave. The fourth lens L4 has a positive optical power. The first surface S7 of the fourth lens is convex, and the second surface S8 of the fourth lens is convex. The fifth lens has a positive optical power. The first surface S9 of the fifth lens is convex, and the second surface S10 of the fifth lens is convex. The filter has a first surface S11 of the filter and a second surface S12 of the filter. Light from the object sequentially passes through the surfaces S1 to S12 and finally forms an image on the imaging surface IMA.

[0253] In this example, the focal length F of the optical lens is 50.6700 mm, the total length TTL of the optical lens is 87.0061 mm, and the maximum field of view angle FOV of the optical lens is 15.6598°.

[0254] Table 9 shows the basic structural parameter table of the optical lens in Example 5. Among them, the unit of the radius of curvature Radius and the thickness Thickness / distance is millimeter (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity represents infinity.

[0255]

[0256]

[0257] Table 9

[0258] In this example, the first lens and the second lens are aspherical lenses. The surface profiles of the aspherical lenses can be defined by, but not limited to, formula (1) in Example 1.

[0259] Table 10 shows the conic coefficient k and the coefficients of each higher-order term A (4th-order term coefficient), B (6th-order term coefficient), C (8th-order term coefficient), D (10th-order term coefficient) that can be used for the aspherical lens surfaces in this example.

[0260] Surf k A B C D 1 0.0428 -5.1531E-10 -7.8367E-10 1.3603E-12 -4.1233E-19 2 -187.0400 2.5658E-07 1.5246E-09 -2.0869E-12 1.3352E-15 3 0.2896 -7.3277E-07 -1.4767E-11 2.1238E-11 -2.1271E-14 4 0.0361 7.0286E-07 6.4180E-09 -4.0357E-12 -2.6734E-14

[0261] Table 10

[0262] Example 6

[0263] As Figure 6 shown, the optical lens sequentially includes a first lens L1, a diaphragm STO, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a filter, and an imaging surface IMA from the object side to the image side.

[0264] The first lens L1 has a positive optical power. The first side S1 of the first lens is convex, and the second side S2 of the first lens is concave. The second lens L2 has a negative optical power. The first side S3 of the second lens is concave, and the second side S4 of the second lens is concave. The third lens L3 has a positive optical power. The first side S5 of the third lens is convex, and the second side S6 of the third lens is concave. The fourth lens L4 has a positive optical power. The first side S7 of the fourth lens is convex, and the second side S8 of the fourth lens is convex. The fifth lens has a positive optical power. The first side S9 of the fifth lens is convex, and the second side S10 of the fifth lens is convex. The filter has a first side S11 of the filter and a second side S12 of the filter. The light from the object sequentially passes through the surfaces S1 to S12 and finally forms an image on the imaging surface IMA.

[0265] In this example, the focal length F of the optical lens is 50.6700 mm, the total length TTL of the optical lens is 87.0064 mm, and the maximum field of view angle FOV of the optical lens is 15.6598°.

[0266] Table 11 shows the basic structural parameter table of the optical lens in Example VI. Among them, the unit of the radius of curvature Radius and the thickness Thickness / distance is millimeter (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity represents infinity.

[0267]

[0268]

[0269] Table 11

[0270] In this example, the first lens and the second lens are aspherical lenses. The surface profiles of the aspherical lenses can be defined by, but not limited to, formula (1) in Example I.

[0271] Table 12 shows the conic coefficient k and the coefficients of each high-order term that can be used for the aspherical lens surfaces in this example.

[0272] Surf k A B C D 1 0.0427 -5.5502E-10 -7.8369E-10 1.3604E-12 -2.2603E-19 2 -187.0300 2.5659E-07 1.5246E-09 -2.0870E-12 1.3350E-15 3 0.2896 -7.3276E-07 -1.4624E-11 2.1238E-11 -2.1273E-14 4 0.0362 7.0291E-07 6.4179E-09 -4.0360E-12 -2.6734E-14

[0273] Table 12

[0274] Example VII

[0275] As Figure 7 shown, the optical lens sequentially includes a first lens L1, a diaphragm STO, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a filter, and an imaging surface IMA from the object side to the image side.

[0276] The first lens L1 has a positive focal power. The first surface S1 of the first lens is convex, and the second surface S2 of the first lens is concave. The second lens L2 has a negative focal power. The first surface S3 of the second lens is concave, and the second surface S4 of the second lens is concave. The third lens L3 has a positive focal power. The first surface S5 of the third lens is concave, and the second surface S6 of the third lens is convex. The fourth lens L4 has a positive focal power. The first surface S7 of the fourth lens is convex, and the second surface S8 of the fourth lens is convex. The fifth lens has a positive focal power. The first surface S9 of the fifth lens is convex, and the second surface S10 of the fifth lens is concave. The filter has a first surface S11 of the filter and a second surface S12 of the filter. Light from an object sequentially passes through the surfaces S1 to S12 and finally forms an image on the imaging surface IMA.

[0277] In this example, the focal length F of the optical lens is 50.6707 mm, the total length TTL of the optical lens is 87.0827 mm, and the maximum field of view FOV of the optical lens is 15.6600°.

[0278] Table 13 shows the basic structural parameter table of the optical lens of Example 7, where the unit of the radius of curvature Radius and the thickness Thickness / distance is millimeter (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity represents infinity.

[0279]

[0280]

[0281] Table 13

[0282] In this example, the first lens is an aspherical lens. The surface profiles of the aspherical lenses can be defined by, but not limited to, formula (1) in Example 1.

[0283] Table 14 shows the conic coefficient k and the coefficients of each high-order term that can be used for the surfaces of the aspherical lenses in this example.

[0284] Surf k A B C 1 2.6245 5.3340E-06 -4.2633E-09 1.5536E-11 2 80.9570 5.1203E-06 2.1893E-08 -1.2553E-11

[0285] Table 14

[0286] Example 8

[0287] As Figure 8 shown, the optical lens sequentially includes a first lens L1, a diaphragm STO, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a filter, and an imaging surface IMA from the object side to the image side.

[0288] The first lens L1 has a positive focal power. The first surface S1 of the first lens is convex, and the second surface S2 of the first lens is concave. The second lens L2 has a negative focal power. The first surface S3 of the second lens is concave, and the second surface S4 of the second lens is concave. The third lens L3 has a positive focal power. The first surface S5 of the third lens is concave, and the second surface S6 of the third lens is convex. The fourth lens L4 has a positive focal power. The first surface S7 of the fourth lens is convex, and the second surface S8 of the fourth lens is convex. The fifth lens has a positive focal power. The first surface S9 of the fifth lens is convex, and the second surface S10 of the fifth lens is concave. The filter has a first surface S11 of the filter and a second surface S12 of the filter. Light from an object sequentially passes through the surfaces S1 to S12 and finally forms an image on the imaging surface IMA.

[0289] In this example, the focal length F of the optical lens is 50.6700 mm, the total length TTL of the optical lens is 87.0840 mm, and the maximum field of view FOV of the optical lens is 15.6600°.

[0290] Table 15 shows the basic structural parameter table of the optical lens of Example VIII, where the unit of the radius of curvature Radius and the thickness Thickness / distance is millimeter (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity represents infinity.

[0291]

[0292]

[0293] Table 15

[0294] In this example, the first lens is an aspherical lens. The surface profiles of the aspherical lenses can be defined by, but not limited to, formula (1) in Example I.

[0295] Table 16 shows the conic coefficient k and the coefficients of each high-order term that can be used for the aspherical lens surfaces in this example.

[0296] Surf k A B C 1 2.6245 5.3340E-06 -4.2633E-09 1.5536E-11 2 80.9570 5.1203E-06 2.1893E-08 -1.2553E-11

[0297] Table 16

[0298] Example IX

[0299] As Figure 9 shown, the optical lens sequentially includes a first lens L1, a stop STO, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a filter, and an imaging surface IMA from the object side to the image side.

[0300] The first lens L1 has a positive optical power. The first surface S1 of the first lens is convex, and the second surface S2 of the first lens is flat. The second lens L2 has a negative optical power. The first surface S3 of the second lens is concave, and the second surface S4 of the second lens is concave. The third lens L3 has a positive optical power. The first surface S5 of the third lens is convex, and the second surface S6 of the third lens is concave. The fourth lens L4 has a positive optical power. The first surface S7 of the fourth lens is convex, and the second surface S8 of the fourth lens is convex. The fifth lens has a positive optical power. The first surface S9 of the fifth lens is convex, and the second surface S10 of the fifth lens is convex. The filter has a first surface S11 of the filter and a second surface S12 of the filter. Light from the object sequentially passes through the surfaces S1 to S12 and finally forms an image on the imaging surface IMA.

[0301] In this example, the focal length F of the optical lens is 50.6824 mm, the total length TTL of the optical lens is 87.0000 mm, and the maximum field of view angle FOV of the optical lens is 15.6599°.

[0302] Table 17 shows the basic structural parameter table of the optical lens in Example 9. Among them, the unit of the radius of curvature Radius and the thickness Thickness / distance is millimeter (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity represents infinity.

[0303] Surf Radius Thickness Nd Vd 1 43.3926 8.3538 1.53 44.44 2 100000000.0000 6.2446 STO Infinity 6.5334 3 -39.5647 5.1943 1.58 27.55 4 35.8570 0.5386 5 37.6566 4.8582 1.85 32.27 6 46.3572 1.9063 7 70.3513 8.3905 1.66 51.14 8 -52.9868 1.2647 9 74.0410 7.3052 1.62 60.34 10 -99.3479 35.0004 11 Infinity 1.1000 1.51 62.91 12 Infinity 0.3100 IMA / /

[0304] Table 17

[0305] In this example, the first lens and the second lens are aspherical lenses. The surface profiles of the aspherical lenses can be defined by, but not limited to, formula (1) in Example 1.

[0306] Table 18 shows the conic coefficient k and the coefficients of each high-order term that can be used for the surfaces of the aspherical lenses in this example.

[0307] Surf k A B C D 1 0.0468 -8.6693E-07 2.2201E-10 4.5699E-13 -2.9325E-16 3 0.1153 -3.5712E-07 8.2994E-09 1.4191E-11 -1.1220E-13 4 0.0015 9.7143E-07 2.3726E-09 -5.8206E-12 -2.3161E-14

[0308] Table 18

[0309] Example 10

[0310] As Figure 10 shown, the optical lens sequentially includes a first lens L1, a diaphragm STO, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a filter, and an imaging surface IMA from the object side to the image side.

[0311] The first lens L1 has a positive optical power. The first surface S1 of the first lens is convex, and the second surface S2 of the first lens is flat. The second lens L2 has a negative optical power. The first surface S3 of the second lens is concave, and the second surface S4 of the second lens is concave. The third lens L3 has a positive optical power. The first surface S5 of the third lens is convex, and the second surface S6 of the third lens is concave. The fourth lens L4 has a positive optical power. The first surface S7 of the fourth lens is convex, and the second surface S8 of the fourth lens is convex. The fifth lens has a positive optical power. The first surface S9 of the fifth lens is convex, and the second surface S10 of the fifth lens is convex. The filter has a first surface S11 and a second surface S12 of the filter. Light from the object sequentially passes through the surfaces S1 to S12 and finally forms an image on the imaging surface IMA.

[0312] In this example, the focal length F of the optical lens is 50.6700 mm, the total length TTL of the optical lens is 87.0000 mm, and the maximum field of view angle FOV of the optical lens is 15.6599°.

[0313] Table 19 shows the basic structural parameter table of the optical lens in Example Ten. Among them, the unit of the radius of curvature Radius and the thickness Thickness / distance is millimeter (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity represents infinity.

[0314] Surf Radius Thickness Nd Vd 1 43.4256 8.3482 1.53 44.44 2 100000000.0000 6.2416 STO Infinity 6.5301 3 -39.5730 5.1833 1.58 27.55 4 35.8465 0.6000 5 37.6965 4.8494 1.85 32.27 6 46.3562 1.9042 7 70.3959 8.3803 1.66 51.14 8 -53.0134 1.2586 9 74.0112 7.2964 1.62 60.34 10 -99.3797 34.9979 11 Infinity 1.1000 1.51 62.91 12 Infinity 0.3100 IMA / /

[0315] Table 19

[0316] In this example, the first lens and the second lens are aspherical lenses. The surface profiles of the aspherical lenses can be defined by, but not limited to, formula (1) in Example One.

[0317] Table 20 shows the conic coefficient k and the coefficients of each high-order term that can be used for the surfaces of the aspherical lenses in this example.

[0318] Surf k A B C D 1 0.0591 -8.3389E-07 2.3276E-10 5.0342E-13 -7.3213E-17 3 0.0985 -3.1954E-07 8.4531E-09 1.4765E-11 -1.1038E-13 4 0.0185 1.0655E-06 2.4695E-09 -5.6922E-12 -2.2944E-14

[0319] Table 20

[0320] Example Eleven

[0321] As Figure 11 shown, the optical lens sequentially includes a first lens L1, a diaphragm STO, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a filter, and an imaging surface IMA from the object side to the image side.

[0322] The first lens L1 has a positive optical power. The first side S1 of the first lens is convex, and the second side S2 of the first lens is convex. The second lens L2 has a negative optical power. The first side S3 of the second lens is concave, and the second side S4 of the second lens is concave. The third lens L3 has a positive optical power. The first side S5 of the third lens is convex, and the second side S6 of the third lens is concave. The fourth lens L4 has a positive optical power. The first side S7 of the fourth lens is convex, and the second side S8 of the fourth lens is convex. The fifth lens has a positive optical power. The first side S9 of the fifth lens is convex, and the second side S10 of the fifth lens is convex. The filter has a first side S11 of the filter and a second side S12 of the filter. The light from the object sequentially passes through the surfaces S1 to S12 and finally forms an image on the imaging surface IMA.

[0323] In this example, the focal length F of the optical lens is 50.5015 mm, the total length TTL of the optical lens is 83.8914 mm, and the maximum field of view angle FOV of the optical lens is 15.6596°.

[0324] Table 21 shows the basic structural parameter table of the optical lens in Example XI, where the unit of the radius of curvature Radius and the thickness Thickness / distance is millimeter (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity represents infinity.

[0325] Surf Radius Thickness Nd Vd 1 44.1627 7.6043 1.53 44.44 2 -256.7588 13.2379 STO Infinity 5.8029 3 -38.4165 4.7928 1.58 27.55 4 39.6956 0.5522 5 40.6376 4.2603 1.85 32.27 6 52.6951 1.6830 7 76.8870 8.4731 1.66 51.14 8 -54.2996 0.5325 9 79.8226 6.8503 1.66 51.14 10 -96.9766 28.6004 11 Infinity 1.1716 1.51 62.91 12 Infinity 0.3302 IMA / /

[0326] Table 21

[0327] In this example, the first lens and the second lens are aspherical lenses. The surface profiles of the aspherical lenses can be defined by, but not limited to, formula (1) in Example I.

[0328] Table 22 shows the conic coefficient k and the coefficients of each high-order term that can be used for the aspherical lens surfaces in this example.

[0329] Surf k A B C D 1 0.0431 5.7038E-10 -5.7115E-10 8.7446E-13 -3.8664E-18 2 -187.3900 2.1202E-07 1.1128E-09 -1.3403E-12 7.6245E-16 3 0.2894 -6.0558E-07 -1.1645E-11 1.3661E-11 -1.2052E-14 4 0.0357 5.8029E-07 4.6842E-09 -2.5860E-12 -1.5137E-14

[0330] Table 22

[0331] Example XII

[0332] As Figure 12 shown, the optical lens sequentially includes a first lens L1, a diaphragm STO, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a filter, and an imaging surface IMA from the object side to the image side.

[0333] The first lens L1 has a positive optical power. The first side S1 of the first lens is convex, and the second side S2 of the first lens is convex. The second lens L2 has a negative optical power. The first side S3 of the second lens is concave, and the second side S4 of the second lens is concave. The third lens L3 has a positive optical power. The first side S5 of the third lens is convex, and the second side S6 of the third lens is concave. The fourth lens L4 has a positive optical power. The first side S7 of the fourth lens is convex, and the second side S8 of the fourth lens is convex. The fifth lens has a positive optical power. The first side S9 of the fifth lens is convex, and the second side S10 of the fifth lens is convex. The filter has a first side S11 of the filter and a second side S12 of the filter. The light from the object sequentially passes through the surfaces S1 to S12 and finally forms an image on the imaging surface IMA.

[0334] In this example, the focal length F of the optical lens is 50.8706 mm, the total length TTL of the optical lens is 84.9766 mm, and the maximum field of view angle FOV of the optical lens is 15.6596°.

[0335] Table 23 shows the basic structural parameter table of the optical lens in Example 12, where the unit of the radius of curvature Radius and the thickness Thickness / distance is millimeter (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity represents infinity.

[0336] Surf Radius Thickness Nd Vd 1 44.1627 7.6543 1.53 44.44 2 -256.7588 13.2379 STO Infinity 5.8029 3 -38.4165 4.8280 1.58 27.55 4 39.6956 0.5522 5 40.6376 4.2603 1.85 32.27 6 52.6951 1.6830 7 77.8870 8.4731 1.66 51.14 8 -54.8570 0.5325 9 79.8226 6.8503 1.66 51.14 10 -96.9766 29.6004 11 Infinity 1.1716 1.51 62.91 12 Infinity 0.3302 IMA / /

[0337] Table 23

[0338] In this example, the first lens and the second lens are aspherical lenses. The surface profiles of the aspherical lenses can be defined by, but not limited to, formula (1) in Example 1.

[0339] Table 24 shows the conic coefficient k and the coefficients of each high-order term that can be used for the aspherical lens surfaces in this example.

[0340] Surf k A B C D 1 0.0431 5.7038E-10 -5.7115E-10 8.7446E-13 -3.8664E-18 2 -187.3900 2.1202E-07 1.1128E-09 -1.3403E-12 7.6245E-16 3 0.2894 -6.0558E-07 -1.1645E-11 1.3661E-11 -1.2052E-14 4 0.0357 5.8029E-07 4.6842E-09 -2.5860E-12 -1.5137E-14

[0341] Table 24

[0342] Example 13

[0343] As Figure 13 shown, the optical lens sequentially includes a first lens L1, a diaphragm STO, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a filter, and an imaging surface IMA from the object side to the image side.

[0344] The first lens L1 has a positive optical power. The first surface S1 of the first lens is convex, and the second surface S2 of the first lens is convex. The second lens L2 has a negative optical power. The first surface S3 of the second lens is concave, and the second surface S4 of the second lens is concave. The third lens L3 has a positive optical power. The first surface S5 of the third lens is convex, and the second surface S6 of the third lens is concave. The fourth lens L4 has a positive optical power. The first surface S7 of the fourth lens is convex, and the second surface S8 of the fourth lens is convex. The fifth lens has a positive optical power. The first surface S9 of the fifth lens is convex, and the second surface S10 of the fifth lens is concave. The filter has a first surface S11 of the filter and a second surface S12 of the filter. The light from the object sequentially passes through the surfaces S1 to S12 and finally forms an image on the imaging surface IMA.

[0345] In this example, the focal length F of the optical lens is 50.0532 mm, the total length TTL of the optical lens is 93.4227 mm, and the maximum field of view angle FOV of the optical lens is 15.6598°.

[0346] In this example, the second surface of the first lens has an inflection point.

[0347] Table 25 shows the basic structural parameter table of the optical lens in Example XIII, where the unit of the radius of curvature Radius and the thickness Thickness / distance is millimeter (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity represents infinity.

[0348] Surf Radius Thickness Nd Vd 1 54.9480 8.4023 1.53 44.44 2 -1741.5761 14.4372 STO Infinity 6.3287 3 -44.3418 5.2270 1.58 27.55 4 37.2879 1.1000 5 46.8087 4.6462 1.85 32.27 6 57.4692 1.8355 7 92.7426 9.2407 1.66 51.14 8 -40.0872 0.5807 9 34.8468 7.5800 1.66 51.14 10 105.7625 32.4065 11 Infinity 1.2777 1.51 62.91 12 Infinity 0.3601 IMA / /

[0349] Table 25

[0350] In this example, the first lens and the second lens are aspherical lenses. The surface profiles of the aspherical lenses can be defined by, but not limited to, formula (1) in Example I.

[0351] Table 26 shows the conic coefficient k and the coefficients of each high-order term that can be used for the aspherical lens surfaces in this example.

[0352] Surf k A B C D 1 -1.6693 -1.3689E-06 -1.6613E-09 5.2778E-12 2.0935E-14 2 4069.5000 -1.9887E-06 1.6595E-09 7.3189E-12 2.8005E-14 3 -0.7885 2.2384E-06 6.4088E-09 4.3795E-12 -6.2203E-14 4 0.2382 1.6370E-06 -5.8828E-09 -1.7849E-11 2.0696E-14

[0353] Table 26

[0354] Example XIV

[0355] As Figure 14 shown, the optical lens sequentially includes a first lens L1, a stop STO, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a filter, and an imaging surface IMA from the object side to the image side.

[0356] The first lens L1 has a positive focal power. The first side S1 of the first lens is convex, and the second side S2 of the first lens is convex. The second lens L2 has a negative focal power. The first side S3 of the second lens is concave, and the second side S4 of the second lens is concave. The third lens L3 has a positive focal power. The first side S5 of the third lens is convex, and the second side S6 of the third lens is concave. The fourth lens L4 has a positive focal power. The first side S7 of the fourth lens is convex, and the second side S8 of the fourth lens is convex. The fifth lens has a positive focal power. The first side S9 of the fifth lens is convex, and the second side S10 of the fifth lens is concave. The filter has a first side S11 of the filter and a second side S12 of the filter. Light from the object sequentially passes through the surfaces S1 to S12 and finally forms an image on the imaging surface IMA.

[0357] In this example, the focal length F of the optical lens is 50.1539 mm, the total length TTL of the optical lens is 93.3227 mm, and the maximum field of view angle FOV of the optical lens is 15.6598°.

[0358] In this example, the second side of the first lens has an inflection point.

[0359] Table 27 shows the basic structural parameter table of the optical lens in Example XIV, where the unit of the radius of curvature Radius and the thickness Thickness / distance is millimeter (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity represents infinity.

[0360] Surf Radius Thickness Nd Vd 1 56.2981 8.4023 1.53 44.44 2 -1007.3429 14.4372 STO Infinity 6.3287 3 -45.9412 5.2270 1.58 27.55 4 35.8445 1.0000 5 43.4830 4.6462 1.85 32.27 6 52.6814 1.8355 7 90.0805 9.2407 1.66 51.14 8 -40.1039 0.5807 9 34.8468 7.5800 1.66 51.14 10 105.7625 32.4065 11 Infinity 1.2777 1.51 62.91 12 Infinity 0.3601 IMA / /

[0361] Table 27

[0362] In this example, the first lens and the second lens are aspherical lenses. The surface profiles of the aspherical lenses can be defined by, but not limited to, formula (1) in Example I.

[0363] Table 28 shows the conic coefficient k and the coefficients of each high-order term that can be used for the surfaces of the aspherical lenses in this example.

[0364]

[0365]

[0366] Table 28

[0367] Example XV

[0368] As Figure 15As shown, the optical lens sequentially includes a first lens L1, a stop STO, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a filter, and an imaging surface IMA from the object side to the image side.

[0369] The first lens L1 has a positive focal power. The first surface S1 of the first lens is a convex surface, and the second surface S2 of the first lens is a convex surface. The second lens L2 has a negative focal power. The first surface S3 of the second lens is a concave surface, and the second surface S4 of the second lens is a convex surface. The third lens L3 has a positive focal power. The first surface S5 of the third lens is a concave surface, and the second surface S6 of the third lens is a convex surface. The fourth lens L4 has a positive focal power. The first surface S7 of the fourth lens is a convex surface, and the second surface S8 of the fourth lens is a convex surface. The fifth lens has a positive focal power. The first surface S9 of the fifth lens is a convex surface, and the second surface S10 of the fifth lens is a convex surface. The filter has a first surface S11 and a second surface S12 of the filter. Light from the object sequentially passes through the surfaces S1 to S12 and finally forms an image on the imaging surface IMA.

[0370] In this example, the focal length F of the optical lens is 50.6703 mm, the total length TTL of the optical lens is 87.0000 mm, and the maximum field of view FOV of the optical lens is 15.6599°.

[0371] Table 29 shows the basic structural parameter table of the optical lens in Example 15. Among them, the unit of the radius of curvature Radius and the thickness Thickness / distance is millimeter (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity represents infinity.

[0372] Surf Radius Thickness Nd Vd 1 200.3734 6.7102 1.52 64.20 2 -65.1585 11.1306 STO Infinity 10.5870 3 -47.3015 4.5052 1.85 23.78 4 -361.8143 1.5400 5 -266.2559 4.3964 1.49 70.44 6 -59.5044 0.5231 7 184.7287 5.4208 1.61 60.61 8 -80.6098 0.8048 9 184.7287 5.4208 1.61 60.61 10 -80.6098 34.5512 11 Infinity 1.1000 1.51 62.91 12 Infinity 0.3100 IMA / /

[0373] Table 29

[0374] In this example, the first lens is an aspherical lens. The surface profiles of the aspherical lenses can be defined by, but not limited to, formula (1) in Example 1.

[0375] Table 30 shows the conic coefficient k and the coefficients of each high-order term that can be used for the aspherical lens surfaces in this example.

[0376] Surf k A B C D 2 -4.8988 1.9930E-07 2.4165E-09 1.6074E-12 -6.0544E-15

[0377] Table 30

[0378] Example 16

[0379] As Figure 16As shown, the optical lens sequentially includes a first lens L1, a stop STO, a second lens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a filter, and an imaging surface IMA from the object side to the image side.

[0380] The first lens L1 has a positive optical power. The first side S1 of the first lens is a convex surface, and the second side S2 of the first lens is a convex surface. The second lens L2 has a negative optical power. The first side S3 of the second lens is a concave surface, and the second side S4 of the second lens is a convex surface. The third lens L3 has a positive optical power. The first side S5 of the third lens is a concave surface, and the second side S6 of the third lens is a convex surface. The fourth lens L4 has a positive optical power. The first side S7 of the fourth lens is a convex surface, and the second side S8 of the fourth lens is a convex surface. The fifth lens has a positive optical power. The first side S9 of the fifth lens is a convex surface, and the second side S10 of the fifth lens is a convex surface. The filter has a first side S11 of the filter and a second side S12 of the filter. Light from the object sequentially passes through the surfaces S1 to S12 and finally forms an image on the imaging surface IMA.

[0381] In this example, the focal length F of the optical lens is 50.6704 mm, the total length TTL of the optical lens is 87.0000 mm, and the maximum field of view FOV of the optical lens is 15.6599°.

[0382] Table 31 shows the basic structural parameter table of the optical lens in Example XVI. Among them, the unit of the radius of curvature Radius and the thickness Thickness / distance is millimeter (mm). Surf is the surface number of the lens, Nd is the refractive index, Vd is the Abbe number, and Infinity represents infinity.

[0383] Surf Radius Thickness Nd Vd 1 200.9246 6.7102 1.52 64.20 2 -65.1075 11.1306 STO Infinity 10.5870 3 -47.3449 4.5052 1.85 23.78 4 -364.2437 1.5400 5 -269.4975 4.3964 1.49 70.44 6 -59.6603 0.5231 7 184.6866 5.4208 1.61 60.61 8 -80.6077 0.8048 9 184.6866 5.4208 1.61 60.61 10 -80.6077 34.5512 11 Infinity 1.1000 1.51 62.91 12 Infinity 0.3100 IMA / /

[0384] Table 31

[0385] In this example, the first lens is an aspherical lens. The surface profiles of the aspherical lenses can be defined by, but not limited to, formula (1) in Example I.

[0386] Table 32 shows the conic coefficient k and the coefficients of each high-order term that can be used for the aspherical lens surfaces in this example.

[0387]

[0388] Table 32 In summary, Examples I to XVI respectively satisfy the relationships shown in Table 33.

[0389]

[0390]

[0391] Table 33 Table 34 gives the overall focal length F (unit: millimeter) of the optical lenses of Examples 1 to 16, etc.

[0392]

[0393]

[0394] Table 34

[0395] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0396] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they specify the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0397] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such used data can be interchanged under appropriate circumstances so that the embodiments of the present application described herein can be implemented in an order different from those illustrated or described herein.

[0398] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An optical lens, characterized in that, Comprising: A first lens having a positive optical power, wherein the first side of the first lens is convex; A second lens having a negative optical power, wherein the first side of the second lens is concave; A third lens having a positive optical power; A fourth lens having a positive optical power, wherein the second side of the fourth lens is convex; A fifth lens having a positive optical power, wherein the first side of the fifth lens is convex.

2. The optical lens according to claim 1, wherein For the optical lens, the radian value θ of the maximum field of view angle, the overall focal length F of the optical lens, and the image height H corresponding to the maximum field of view angle of the optical lens satisfy: |(H - F * θ) / (F * θ)| ≤ 0.

15.

3. The optical lens according to claim 1, wherein For the optical lens, the back focal length BFL of the optical lens and the overall length TTL of the optical lens satisfy: BFL / TTL ≥ 0.

3.

4. The optical lens according to claim 1, characterized in that, For the optical lens, the back focal length BFL of the optical lens and the lens group length TL of the optical lens satisfy: BFL / TL ≥ 0.

35.

5. The optical lens according to claim 1, characterized in that, For the optical lens, the overall focal length F of the optical lens and the image height H corresponding to the maximum field of view angle of the optical lens satisfy: F / H ≥ 1.

5.

6. The optical lens according to claim 1, wherein For the optical lens, the overall focal length F of the optical lens and the entrance pupil diameter ENPD of the optical lens satisfy: F / ENPD ≤ 1.

7.

7. The optical lens according to claim 1, characterized in that For the optical lens, the overall focal length F of the optical lens and the effective aperture DST of the diaphragm of the optical lens satisfy: DST / F ≥ 0.

25.

8. The optical lens according to claim 1, wherein For the optical lens, the maximum field of view angle FOV, the overall focal length F of the optical lens, and the image height H corresponding to the maximum field of view angle of the optical lens satisfy: (FOV × F) / H ≥ 45.

9. An optical lens, characterized in that, Comprising: A first lens having a positive optical power; A second lens having a negative optical power; A third lens having a positive optical power; A fourth lens having a positive optical power; A fifth lens having a positive optical power; Wherein, for the optical lens, the back focal length BFL of the optical lens and the overall length TTL of the optical lens satisfy: BFL / TTL ≥ 0.

3.

10. An electronic device, characterized in that, Comprising the optical lens according to any one of claims 1 to 9 and an imaging element for converting the optical image formed by the optical lens into an electrical signal.

Images